Explosive chemistry - with Andrew Szydlo

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  • เผยแพร่เมื่อ 25 มี.ค. 2024
  • Discover the evolution of explosive chemical experiments, with the maestro of chemistry Andrew Szydlo.
    Sign up as a TH-cam Channel Member to watch the Q&A here: • Q&A: Explosive chemist...
    This Discourse was recorded at the Ri on 29 February 2024.
    Go on a journey with Andrew's dazzling demonstrations and experiments, interspersed with anecdotes from his life to show a glimpse behind the curtain of this enigmatic man.
    --
    Safety disclaimer: Andrew Szydlo is an expert, trained chemist who has performed these experiments hundreds of times. He has chosen them carefully to fit the Ri Theatre, and has assessed all risks in advance. Please do not try these experiments at home!
    --
    You'll find out more about Andrew's past exploits, including:
    1. A daring and "strictly banned" experiment involving the explosive mixture of sodium hypophosphite and potassium chlorate at Latymer Upper School in 1966, resulting in a resounding detonation that reverberated through the entire building. The experiment aims to illustrate the stark contrast between this forbidden concoction and conventional black powder.
    2. An unforgettable escapade in 1982, when he tossed sizable lumps of sodium down a drain in Exeter, later transformed into a demonstrative experiment involving the controlled use of sodium pieces submerged in a water-filled Perspex tube.
    3. A spectacular chemistry lecture at Cambridge University in 2012, where a tennis ball fired from a mortar blasted a hole through the ceiling of the Myers Squibb Lecture theatre. This momentous event was part of a lecture titled "Fireworks and Waterworks."
    4. A thrilling endeavour in 1981, when a mixture of acetylene and oxygen was detonated in a school playing field using a dustbin liner. The shockwave caused the windows of a nearby boarding house to shake, prompting the housemaster to investigate the aftermath, only to find a gaping crater.
    5. A run-in with the authorities in Epping Forest in 1980, stemming from the conduct of oversized chemical conflagrations involving butane gas canisters, weedkiller, and sugar. This incident led to the development of a fascinating experiment that demonstrates the ignition of a mixture of icing sugar and potassium chlorate using a drop of concentrated sulphuric acid.
    6. A shift in the trajectory of his demonstrations in 1990, when the headmaster of Highgate School banned explosive chemical displays. Inspired by a passionate pupil, Ian Cohen, who had an affinity for magic, Dr. Szydlo transitioned his explosive talks into "Flower Power" magic shows, delivering the same excitement on a grander scale.
    ----
    Andrew Szydlo is a chemist and secondary school teacher at Highgate School, well-loved by pupils and Ri attendees alike. He has given public lectures around the country, been featured on TV shows and has become a popular part of the Ri's TH-cam channel in recent years, where his videos have over 16 million views in total.
    During the past 40 years he has given over 500 talks, in addition to teaching chemistry full-time at Highgate School in London. Today he is still based at Highgate School, delivering chemistry lectures to local schools.
    The Royal Society of Chemistry included Andrew as one of their 175 Faces of Chemistry.
    ---
    Discourses are one of the Ri’s oldest and most prestigious series of talks. Since 1825, audiences in the theatre have witnessed countless mind-expanding moments, including the first public liquefaction of air by James Dewar, the announcement of the electron by JJ Thomson and over 100 lectures by Michael Faraday. In more recent times, we have had Nobel laureates, Fields medal winners, scientists, authors and artists - all from the cutting-edge of their field. Discourses are an opportunity for the best and brightest to share their work with the world.
    Steeped in nearly two centuries of tradition, a Discourse is more than just a lecture. The Discourse lasts exactly an hour, and a bell is rung to mark the beginning and end. To keep the focus on the topic, presenters begin sharply at 7:30pm without introduction and we lock the speaker into a room ten minutes ahead of the start (legend has it that a speaker once tried to escape!). Some of our guests and speakers dress smartly for our Discourse events to add to this sense of occasion. Read more about Discourses here: www.rigb.org/explore-science/...
    ----
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ความคิดเห็น • 191

  • @W-H-O
    @W-H-O หลายเดือนก่อน +173

    "with Andrew Szydlo" my favorite part of any lecture title, his enthusiasm to teach children makes me feel like a child again myself!

    • @bookman7409
      @bookman7409 หลายเดือนก่อน +7

      He's who everyone, of any age, would love as a favorite grandparent or great-uncle. He reminds me of my own favorite great uncle Arnold, save that he was a farmer and less energetic. His gentle, patient approach to teaching me things was undoubtedly part of what drove my own parenting, as a teacher to them.

  • @frogz
    @frogz หลายเดือนก่อน +99

    RI, PLEASE NEVER STOP BRINGING ANDREW SZYDLO BACK, his love of science is infectious

  • @dasgettopikachu7878
    @dasgettopikachu7878 หลายเดือนก่อน +30

    he's gone insane and i love it

  • @jameseats4144
    @jameseats4144 หลายเดือนก่อน +59

    Went to watch this live. A hugely entertaining evening - such a great lecturer.

    • @Erebusdidnothingwrongish
      @Erebusdidnothingwrongish หลายเดือนก่อน

      🫡

    • @tncorgi92
      @tncorgi92 หลายเดือนก่อน

      I wish I lived in the UK. Here in America it's no longer fashionable to embrace science or reason.

    • @krzysztofwaleska
      @krzysztofwaleska หลายเดือนก่อน

      ​@@tncorgi92why? Science or science-fiction is always good, beacouse it trains your brain's muscle...

    • @YoungAstronomicalReaserc-zf8zy
      @YoungAstronomicalReaserc-zf8zy หลายเดือนก่อน

      @@krzysztofwaleska He means the amount of conspiracy theorists and science deniers in Murica

    • @shable1436
      @shable1436 หลายเดือนก่อน

      Remember Eric laithwaites lectures on TH-cam? Talk about enchanting

  • @last0titan
    @last0titan หลายเดือนก่อน +23

    I finished watching this lecture with the biggest smile on my face, 10/10.
    Edit: I would also love to see how he managed to evacuate the RI for the first time!

  • @lindafoxwood78
    @lindafoxwood78 หลายเดือนก่อน +24

    It is so wonderful how Andrew Szydlo teaches! Thank you so much.

  • @ChrisCrozier
    @ChrisCrozier หลายเดือนก่อน +52

    Dr. Szydlos basement shenanigans were one of the few high points during the pandemic lockdown. Thank you for that.

    • @lizelleswanepoel116
      @lizelleswanepoel116 หลายเดือนก่อน +2

      Does he have a TH-cam channel?

    • @Kargoneth
      @Kargoneth หลายเดือนก่อน

      They certainly were!

    • @Kargoneth
      @Kargoneth หลายเดือนก่อน +2

      He does not. The videos from then are on this channel with the title "Szydlo's At Home Science".

  • @advancedretailukltd7061
    @advancedretailukltd7061 หลายเดือนก่อน +20

    Such joy in science and making bangs. This absolutely made my day. Thank you RI and Mr Szydlo.

  • @subliminalvibes
    @subliminalvibes หลายเดือนก่อน +32

    If it's not two hours long I'll be disappointed.
    Andrew is just wonderful! Thank you. 👍😎🇦🇺

    • @TheRoyalInstitution
      @TheRoyalInstitution  หลายเดือนก่อน +9

      This lecture is exactly an hour as it's one of our famous Discourses (find out more about Discourses here: www.rigb.org/explore-science/explore/blog/history-friday-evening-discourse ) - but Andrew certainly packs a lot into 60 minutes!

    • @subliminalvibes
      @subliminalvibes หลายเดือนก่อน +6

      @@TheRoyalInstitution Haha, thanks for the reply. I look forward to any content from Professor Andrew and The RI channel. I look forward to watching this right now. 👍😎🇦🇺

  • @murraymaclean4125
    @murraymaclean4125 29 วันที่ผ่านมา +4

    Reminded me of my favourite teachers at school who I learned most from. Thank you Andrew Szydlo. I wish there were more like you when I was a kid, in the 70's and 80's... I would have learned soo much more

  • @JoTheVeteran
    @JoTheVeteran หลายเดือนก่อน +19

    I love this guy!
    Give him more space and more pyrotechnics!

  • @mustafadigibong6833
    @mustafadigibong6833 หลายเดือนก่อน +3

    Being Polish, I am proud of this awesome and brilliant teacher! Respect panie Andrzeju!

  • @k29king1
    @k29king1 25 วันที่ผ่านมา +2

    When you already know his story about the no acid medicine salesmen, then you know you have watched all of Andrews content. This man’s enthusiasm for chemistry is contagious.

  • @mr.lonewolf8199
    @mr.lonewolf8199 หลายเดือนก่อน +7

    Such enthusiastic lecturer. His joyment in lecturing is contagious 😊

  • @michaeldamolsen
    @michaeldamolsen หลายเดือนก่อน +5

    Every Szydlo lecture is an absolute treasure! What a wonderful mixture of highly entertaining anecdotes and explosions. The cherry on top was seeing that he speaks better Dutch after having exchange students 40 years ago when I was a small child, than I do after living in The Netherlands the last 20 years.

  • @callumsastrophotography4859
    @callumsastrophotography4859 21 วันที่ผ่านมา +1

    Andrew's teaching was a part of the reason I ended up with a PhD in the sciences. Better still he inspired my kids through his 'explosive' demonstrations at their school. Long may he continue.

  • @alexmol
    @alexmol หลายเดือนก่อน +11

    I love you Prof. Szydlo!

  • @richardgainsborough8087
    @richardgainsborough8087 21 วันที่ผ่านมา +1

    Mr Szydlo’s enthusiasm for the subject is undiminished, more than 40 years since he taught me. I also remember the Triumph Herald convertibles and the player piano he lovingly restored in the music dept.

  • @romvoid5177
    @romvoid5177 หลายเดือนก่อน +7

    all of my favorite RI lectures include Andrew Szydlo in the video title!

  • @andyb7813
    @andyb7813 หลายเดือนก่อน +9

    Saw this live, Andrew was fantastic 👍

    • @tncorgi92
      @tncorgi92 หลายเดือนก่อน

      Wish I lived in the UK and could attend his lectures in person!

  • @AdrianBland
    @AdrianBland 16 วันที่ผ่านมา +1

    Lucky enough to have Mr Zydlo as my teacher at school - unfortunately I was no good at Chemistry but the classes were never dull!!

  • @user-og2bp4kx8g
    @user-og2bp4kx8g 21 วันที่ผ่านมา +2

    this is the first video with Andrew Szydlo in it and he is a legend I really want him as a chemistry teacher at my school

  • @alex79suited
    @alex79suited หลายเดือนก่อน +12

    The RI always has terrific lectures I thoroughly enjoy them, thanks so much. Great job 👏. Peace ✌️ 😎.

  • @Jethro.Maloku-le.Rey.Kalsitran
    @Jethro.Maloku-le.Rey.Kalsitran หลายเดือนก่อน +3

    Andrew please, do it again and BIGGER

  • @GrandadTinkerer
    @GrandadTinkerer หลายเดือนก่อน +7

    I think that everybody wishes that he had been their chemistry teacher!

  • @rafazieba9982
    @rafazieba9982 หลายเดือนก่อน +4

    The things he mentioned he couldn't translate ("acetylene" and "silver acetylide") are "acetylen" and "acetylenek srebra" in Polish. Somewhat recognizable. The phrase "dobrze wybucha, gdy to się podpali" means "it explodes nicely when ignited".

  • @salehinkibria8377
    @salehinkibria8377 หลายเดือนก่อน +2

    that smile on his assistant's face in the background at 11:14 is what it is all about. the assistant must have seen the routine countless times, yet can't help be impressed.

  • @user-uu8wh9du1d
    @user-uu8wh9du1d หลายเดือนก่อน +10

    Hats off!

  • @marcmarc172
    @marcmarc172 หลายเดือนก่อน +3

    First lecture to nail the timing. I'm speechless - perfection!

  • @bentboybbz
    @bentboybbz หลายเดือนก่อน +2

    This man never disappoints, he is always very respectful to his assistants, I wish he were my teacher, I have great respect for this man, he has a such a large fire burning in him for science that he can share a spark with everyone, that hopefully starts many more fires, Thank You my good sir, for your time and effort!

  • @rickloyd8208
    @rickloyd8208 หลายเดือนก่อน +2

    What an individual! I long for teachers like him and people who possess the ability to think and articulate their thoughts swiftly. Listening to them is a delight to my ears!

  • @BlameThande
    @BlameThande หลายเดือนก่อน +1

    Andrew has done the annual fireworks lecture for our ChemSoc at the University of Sheffield a number of times, he is always fantastic. Real science and great entertainment. That exploding dustbin still gets me every time.

  • @mikesummers-smith4091
    @mikesummers-smith4091 หลายเดือนก่อน +1

    Does anyone else remember Colonel B D Shaw and his lectures on explosives? Pound to a penny that Dr Szydlo does.

  • @phonotical
    @phonotical 18 วันที่ผ่านมา

    I love that he is still doing this performance after a number of years, gets better every time!

  • @Kargoneth
    @Kargoneth หลายเดือนก่อน +3

    Doctor Andrew Zbigniew Szydło and his ever-dependable technician Andres Tretiakov! The dynamic duo strikes again!
    Always a pleasure to experience Szydło's enthusiasm and loquaciousness.
    I've seen them demonstrate this explosive chemistry lecture previously (or all of the parts thereof). Loved watching it again. The slideshow was quite endearing.

  •  หลายเดือนก่อน +1

    His enthusiasm is contagious.

  • @zerthura8500
    @zerthura8500 หลายเดือนก่อน +2

    Beautiful lesson. 1 hour of funny stories and very very interesting chemistry. I think I also improved my English translating all you said so fast. Thank you Doctor for this lesson. I was glad to be able to listen to your lesson.

  • @lrwerewolf
    @lrwerewolf หลายเดือนก่อน +1

    I hope we find the secret to human biological immortality while Dr. Szydlo is still alive as he is a treasure of education and passion.

  • @paulcoffey359
    @paulcoffey359 หลายเดือนก่อน +3

    One time at a party, my mate crushed a bunch of sparkler powder into a tennis ball, that he'd cut a hole in. Next minute he was seen naked on the roof performing a handstand, whilst illuminated by the sparkler fountain. It was a synergetic moment of chemistry and performance arts in the Australian suburbs.

    • @M0UAW_IO83
      @M0UAW_IO83 หลายเดือนก่อน +1

      I'm not ruling it out but I don't think that's a science demo RI would host

  • @tncorgi92
    @tncorgi92 หลายเดือนก่อน +4

    "Curb your loquacity" would make a great t-shirt.

  • @Erebusdidnothingwrongish
    @Erebusdidnothingwrongish หลายเดือนก่อน +1

    The speed and Enthusiasm of this Lecture was fantastic!
    The Dual Boring/ Exciting reactions (explained for all to understand) really show someone in love with Science.
    I wish I had this man for my Chemistry Lessons. Part 2 please x

  • @shresthachowdhury1770
    @shresthachowdhury1770 หลายเดือนก่อน +1

    What a joy to see the demonstrations!

  • @MrAshtute
    @MrAshtute หลายเดือนก่อน +1

    I love Andrew's lectures he is so enthusiastic about chemistry it's infectious and of course people like that draw pupils in and make the subject more fun and informative.

  • @allessie3203
    @allessie3203 หลายเดือนก่อน +4

    🇳🇱 👌 heel goed uitgesproken, bijna niet te onderscheiden van een Nederlander. Dankuwel!

    • @jjwubs1638
      @jjwubs1638 หลายเดือนก่อน

      Ben even benieuwd : waar gebeurt dit?

    • @FredStam
      @FredStam หลายเดือนก่อน

      @@jjwubs1638
      Royal institution London

  • @RandallSchwed
    @RandallSchwed หลายเดือนก่อน

    His energy and enthusiasm is contagious.

  • @Crabby303
    @Crabby303 หลายเดือนก่อน

    Always a delight & joy to watch Andrew :D

  • @Ella-hy9xh
    @Ella-hy9xh หลายเดือนก่อน

    I have adored all of Andrew Szydlo's presentations, thank you so much for all of this spectacular content. I am in tears, relating to his hardships with teacher's when he was younger. I was failed by my high school physics teachers for many of the same reasons he received criticism, and today I run my own engineering consultancy business in thermodynamics and electrical engineering. The premise that a passion for science is what is most important for success and enjoyment, is so true! That he continues to inspire passion in the chemists and scientists coming along behind us all is so virtuous.

  • @HA05GER
    @HA05GER หลายเดือนก่อน

    I love the enthusiasm and how hectic he is, really makes it enjoyable to watch i always enjoyed science.

  • @mouseDown83
    @mouseDown83 หลายเดือนก่อน +1

    Always a treat to watch a presentation by Mr. Szydlo! His Dutch is still quite good, chapeau!

  • @glarynth
    @glarynth หลายเดือนก่อน +1

    I didn't think it was possible, but I think Dr. Szydlo's stage presence has improved yet further.

  • @samakovamk
    @samakovamk หลายเดือนก่อน

    Great Prof.Andrew is back.....yippee....cant get enough of him.....

  • @martijndraijer8414
    @martijndraijer8414 หลายเดือนก่อน

    Andrew Szydlo the teacher i always wanted but never had. I was so happy to see a video pop up in my recommended with his name on it. I could listen to him al day! Superb!

  • @hajikulalam606
    @hajikulalam606 หลายเดือนก่อน +2

    Thank you from India

  • @ianzagorskikh3964
    @ianzagorskikh3964 11 วันที่ผ่านมา

    Brilliant, Mr Andrew! This is the best explanation I ever heard of my own way to Chemistry when I was that age. Bravo! Thank you!

  • @Davidmwalter
    @Davidmwalter หลายเดือนก่อน +1

    It is always great to see Andrew Szydlo do these experiments. Very entertaining. I would have loved to have him as a teacher. I just like the way he does things. This particular lecture was more into his life as a chemist. It was great to hear about his past. Loved the pictures, old video, things from his school days, etc. Can’t wait to see another one of Andrew’s lectures again, especially with fire and explosions. 🤪😀😂. Virginia, USA.

  • @2nostromo
    @2nostromo หลายเดือนก่อน +2

    I looked up "loquacious" and there was a picture of.... wait for it... HIM!

  • @twocvbloke
    @twocvbloke หลายเดือนก่อน

    I do love listening to Andrew and his stories of what he got up to over the years, a proper teacher that knows how to get the point across while having lots of fun too... :D

  • @davidjowett8195
    @davidjowett8195 หลายเดือนก่อน

    We all need an Andrew Szydlo in our school lives.

  • @MrFerdy1986
    @MrFerdy1986 หลายเดือนก่อน

    Really enjoyable lesson!! Thank you very much!

  • @gazzas123
    @gazzas123 หลายเดือนก่อน

    when I was in High School we had a science teacher who made science very interesting to the point everyone paid strict attention in what he was doing. This was not just to learn the science but to be ready to exit the room via the most convent exit including the windows, which were always kept open.

  • @jtcustomknives
    @jtcustomknives หลายเดือนก่อน

    By far my favorite and always entertaining

  • @2BadgersBlue
    @2BadgersBlue หลายเดือนก่อน +3

    Has Andrew's name been put forward for the honours list yet? An MBE, OBE or something? Surely deserving.

  • @nyckhampson792
    @nyckhampson792 หลายเดือนก่อน

    'PYROMANIA' -- 'Def Leppard'...
    What an amazing man , what a great teacher , I bet his pupils were so looking forward to his chemistry class .I loved magnesium ribbon once lit ....hes like 'Magnus Pike' ,for us that remember him ....marvellous men...respect

  • @danielbartlett2381
    @danielbartlett2381 หลายเดือนก่อน

    Love this man! A national treasure indeed.

  • @milliosmiles5160
    @milliosmiles5160 17 วันที่ผ่านมา

    Awesome as always!

  • @Mkbshg8
    @Mkbshg8 หลายเดือนก่อน

    Only a few minutes in but I love this man's enthusiasm so far, what a showman!

  • @krzysztofwaleska
    @krzysztofwaleska หลายเดือนก่อน

    ,,Dobrze to wybucha, gdy...''. Uwielbiam te wykłady. Dziękuję panie Szydło!

  • @dmitryp3746
    @dmitryp3746 หลายเดือนก่อน +1

    I’m fan of professor Szydlo. New lecture, hooray!

  • @TheEmpressPalpatine
    @TheEmpressPalpatine หลายเดือนก่อน +1

    Watching that was a lot of fun. That one with the shooting ping pong balls seems similar to the historical muzzle loading guns.

  • @2nostromo
    @2nostromo หลายเดือนก่อน

    More Please. I would like more!

  • @danielbartlett2381
    @danielbartlett2381 หลายเดือนก่อน

    I wish I could re-like this one with additional views. I’d play it on a loop for days.

  • @andycordy5190
    @andycordy5190 หลายเดือนก่อน +1

    What a hero of education!🎉 As they say, education is all about lighting fires and not filling barrels.

  • @pachting
    @pachting หลายเดือนก่อน

    thank YOU very much !

  • @doverghostcore8523
    @doverghostcore8523 หลายเดือนก่อน

    Andrew pls, we need more "Szydlo's at home". So we can see you more often since you are at home. A pleaseure to see you every time.

  •  หลายเดือนก่อน

    Greetings from Popayan, Colombia. Great lecturer.

  • @manicmatt7773
    @manicmatt7773 หลายเดือนก่อน

    Love his enthusiasm. I need a sleep now to digest.

  • @OMGitzEDD
    @OMGitzEDD หลายเดือนก่อน

    science / chemistry was the only classes i payed attention to best classes ever

  • @vibehighest
    @vibehighest 25 วันที่ผ่านมา

    Love this

  • @DaveOz-mx5oh
    @DaveOz-mx5oh หลายเดือนก่อน +1

    one of the worlds greatest science communicators!!!

  • @KSignalEingang
    @KSignalEingang หลายเดือนก่อน +1

    32:46 is a straight up album cover if I've ever seen one.

  • @PronatorTendon
    @PronatorTendon 4 วันที่ผ่านมา

    Excellent

  • @michaelgian2649
    @michaelgian2649 หลายเดือนก่อน

    Thank you very much, indeed!

  • @joshuasukhdeo2498
    @joshuasukhdeo2498 24 วันที่ผ่านมา

    Szydlo is the best!!!

  • @morseoneuk
    @morseoneuk หลายเดือนก่อน

    Brilliant!

  • @Pizzpott
    @Pizzpott 5 วันที่ผ่านมา

    Now this guy is the epitome of enthusiasm.

  • @crazywickedcustoms7272
    @crazywickedcustoms7272 16 วันที่ผ่านมา +1

    Chemistry is awesome ❤

  • @sbperformance7320
    @sbperformance7320 หลายเดือนก่อน +1

    I loved this lecture and his knowledge in this field but I feel I have to say it at least once ”art is an explosion”

  • @TKFKU
    @TKFKU หลายเดือนก่อน

    This man has taught me so much about blowing things up.

  • @curiositatibus2846
    @curiositatibus2846 หลายเดือนก่อน +1

    SUCH FUN AND INSPIRATIONAL ... A pity schools can't/won't do this kind of thing now. Every chemistry teacher should show this kind of science to their class.

    • @tncorgi92
      @tncorgi92 หลายเดือนก่อน

      My high school science teacher did demos like these, always with fun bangs or violent reactions, but that was 40 years ago. No way he would be allowed now.

  • @mrlampcompressor1614
    @mrlampcompressor1614 27 วันที่ผ่านมา

    I wish I had a teacher like this

  • @toastedbacon1219
    @toastedbacon1219 หลายเดือนก่อน +1

    Inspiring

  • @msxcytb
    @msxcytb หลายเดือนก่อน

    great to see also polish language used! Profesors name and last nane are quite revealing but now it is clear that he is active speaker and not only descendant of polish parents or grandparents. Dziekuje za piekne prezentacje I pasje do cheemii!

  • @PacificAirwave144
    @PacificAirwave144 21 วันที่ผ่านมา

    This guy is a treasure!

  • @DroneLearner
    @DroneLearner หลายเดือนก่อน

    Oh, how I would love to have Andrew as my chemistry teacher

  • @Shipfish
    @Shipfish หลายเดือนก่อน

    amazing!

  • @emeinc7224
    @emeinc7224 10 วันที่ผ่านมา

    Bless

  • @Crabby303
    @Crabby303 หลายเดือนก่อน

    @43:12 Andrew Szydlo - blowing up the place since 1982 🤣🤣

  • @Silverbirchleaf
    @Silverbirchleaf หลายเดือนก่อน +1

    I keep potassium permanganate at home for emergencies - fire starting and water purification

  • @kentherapy7022
    @kentherapy7022 หลายเดือนก่อน +1

    Thats incredible. Andrew Szydlo looks a like profesor Proton from Big Bang Theory. Even same diction, color of voice. Shortly identical type of chemist.

  • @anthonykoeslag
    @anthonykoeslag หลายเดือนก่อน

    excellent - passionate person :D