Steam Powered Machine Guns and Lie Detectors | MythBusters | Season 5 Episode 24 | Full Episode
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- เผยแพร่เมื่อ 30 พ.ย. 2023
- #MythBusters #FactOrFiction
Jamie and Adam are testing out how powerful a steam powered machine gun can be while the team are testing ways to see if it is possible to beat a lie detector.
Using science as a tool, Hollywood special effects experts attempt to debunk rumours, urban legends and popular myths that have captivated the minds of many individuals.
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Youll never really have to worry about beating a lie detector test, theyre inadmissible in court
True but they can use the results to obtain a confession from you, or to give them leads in their investigation that might lead to concrete evidence
And falsely passing one may get them off your back
@@MonotoneCreeper that's not accurate though. It is not the results (mostly pseudo-scientific gibberish, anyway) but the records of previous and maybe later interview what they could use to indict you. That's the big secret about polygraphs, the machine is only part of a staging designed to build up the stress on the interviewee with the hope of obtain a spontaneous confession.
@@MonotoneCreeper there will never be a time where you will be forced to take lie detector test. The police will guilt trip you to take it or anything so they can have an excuse to hold you or search you whatever they make up. Just get a lawyer and stfu.
Court is where justice will hit ya. Lie detectors may be in use where you have no right to an attorney ;)
Adam keeps playing gleefully with balls and what's basically a simple metal tube, nothing more.
Jamie: "Yeah, I know it's fun, let me get back to work."
That's probably the most succinct characterization of the two possible..
Supposedly the two of them couldn't stand each other whatsoever.
I'd have to agree Adam is way more enthusiastic than Jamey.
As the beginning of each episode says they have a combined 30 years as actors and special effects experts.
This is absolutely one of my favorite shows growing up. I am truly grateful for all the years and truly wish I could make a living myself having the time of my life everyday.
I'm at a point in life where I am stuck.
I have done just about every occupation in one way or another.
I am crippled with option overload.
@@sethstatler8480 "Supposedly the two of them couldn't stand each other whatsoever."
Yep. That said, them still working great on screen just shows how professional they are.
@@sethstatler8480 I don't think they couldn't stand each other they just aren't compatible as friends. Haven't read or heard a bad word about the other from either of them. I think the media really blew their relationship out of whack because people for some reason want everyone on non-scripted TV to be besties. If they couldn't stand each other, there wouldn't ever have been a show.
17:20 "YEA STOP TALKING WHAT IS THE PSI"
about 171 psi, it does not propel the projectile, it just spin the barrel
😭
Kari's face after the second test......she was actually angry :)
It always disgusts me how the polygraph people lie about the accuracy & efficacy of their stupid pseudoscience machine, and about the related scientific research. The fact of the matter is they *need* people to believe it works, in order for it to have the intimidating effect that the operators rely on.
The process needs to intimidate people in order to put the subject under stress in order to break their composure and force mistakes and inconsistencies in their answers. A "lie detector test" is less about the stupid machine, and more about the interrogation techniques of the operator.
In theory, you might think, if someone is telling the truth they shouldn't feel the stress, right? Wrong! The "false positive" rate of a polygraph "test" is estimated to be about 50%. That is, assuming you're being truthful, there's still a 1-in-2 chance that the operator will conclude that you are lying.
For most honest people, simply being falsely accused of something is incredibly stressful, and polygraph tests are *not* designed to be reassuring in any way. Polygraph tests have been an integral part of innumerable false convictions and forced false confessions. If you are someone who cares more about justice than about securing a conviction (ie, you're a normal person, and not a police detective), I believe the more you look into this ridiculous tool of injustice, the stronger your moral conviction against it should be.
I guess overselling the polygraphs ability is necessary to make it work. If anybody would think they don't work, the polygraph has nothing to detect. Like magic tricks, its about convincing the audience.
You got the point. Polygraphy has never been about rate the sincerity (or insincerity) of your answers. That's scientifically impossible, the mere concept of truth is not about facts but moral standards. Polygraphy Is about press you enough to confess (whether you are guilty or not). And that put it at the same level of sleep deprivation and other forms of psychological torture.
I ain't readin allat 💀
@@danataininja1243 tl;dr Polygraphs are a scam
@@danataininja1243 Basically polygraphs are statistically bullshit since they measure stress, and being arrested tends to be stressful, leading to false convictions. It's less about being able to lie to them and more about them not detecting the truth.
4:20 I'd pay to hear their hourlong brainstorm uncut.
Be a good Tested Ep
When they talk about the studies on the polygraph. They fail to mention that the lower figure would mean two out of ten being wrongly convicted if they used this in court. Why are the figures not more consistent if it's so good?
Because all humans are muntants and there is nothing that fits everyone.
Because it's a good tool to support accusations in the eyes of the public.
They also curiously dont mention the false positive rate, which is quite high. If you are innocent, getting a polygraph test is a bad idea. It's inherently not designed to measure falsehood, its designed to measure stress and the stress of avoiding a false conviction is quite high.
It's just an all too small samplesize.
@@hexlart8481 Why would the stress of avoiding a false conviction be higher than the stress of avoiding a righteous conviction?
This is one of my fave eps. The steam machine guns is one of the coolest builds the show had
I guess they had to give the cops a propaganda freebie on the lie detector stuff so that they can keep using their bomb squad
ok then buddy.
@@tipf You know TH-cam has a like function right? You don't need to leave a comment
@@DeadAndAliveCat not everything is a conspiracy.
How do they know the polygraph hasn't been beaten? Surely the whole point of defeating a lie detector is to not get detected beating the detector.
This "experiment" is full of confirmation bias. It´s almost like a police enforcement paid promotion. 🤣
Well they do know that's why the rest of the world doesn't use them... Because they are extremely unreliable
They would put someone under the detector and comes out as innocent, and then collect enough proof to know that it was him, so he had to have beaten the detector
@@LeVarito I reject your reality and substitute my own.
Some spy beat the polygraph twice, I think it was on show QI.
Shilling for the bogus interrogation technique. The lie detector is a sham.
Granted, this was recorded over a decade ago, before it was known how bad it was.
RIP Grant
Seeing Grant on brain scan machine is extra sad.
Okay not to be the boo man here, but the last test had them all steal either the ring or the watch which means the lie detector test was a 50:50 chance for all participants... I think they should have done at least 2 runs with someone not stealing something and see if they would have falsely accused someone. Still a very entertaining episode to watch!
47:02 Jamie riding a Conversion Ebike in 2007.
They could increase muzzle velocity on the cannon
Longer barrels. Lubricating the rounds
I believe that with tweaking the design could make it lethal
also smaller balls
Like yours?@@Astharot90
@@Astharot90 How would that improve the lethality?
@@kaptein1247 depends on how you define lethality. If it's a chance of penetration, it will definitely help, since the pressure would increase. For example, a 2000 kg car at 3 km/h will have similar energy to a 9mm bullet at 1300 km/h (if I didn't mess up the calculations). That car will probably hurt you and might even kill you, but, the worst case scenario, it will be because it crushed your bones, not because it went through you.
Besides, a smaller ball at a higher velocity will be more accurate since it can resist gravity a bit better.
Part of me wonders if the steam machinegun wasn't fully intended to kill, but was meant to be more of an intimidation factor?
I mean, you didn't exactly want to charge a musket line to begin with, even with how innaccurate they could be at range.
Would you, as a civil war soldier, want to charge toward a line with a couple of these strange machines hissing and bellowing steam; that suddenly start hurling shot at you in rapid succession? Even if the rounds couldn't penetrate like in the MB tests here.. considering it still broke bone? you hit someone in the chest, head, throat? and they're still going down with internal trauma, concussion ext depending where it hit em.
Given the time period, weapons n such of the day and what was going on; I think it'd still have been effective in certain areas of combat, even if only as a deterant.
Most soldiers would look at that and laugh. But in a serious note not many men of the Union Army would understand velocity, range, or ECT..
not to mention, you could lube the shaft, add rifling, and extend it as well to create even higher velocities, if you use smaller shot it will also have a substantially easier time penetrating against skin if thats your goal
You could also set it up to have a cone of possible projectiles and use it in fort defense, this sort of thing seems better suited to that anyways - imagine angling that thing downwards to add additional velocity and having multiple overlapping kill zones in a pentagonal fort, you could also add armour around it if its stationary. Fort assaults would be out of the question
Yes, add rifling to a spherical projectile, because that'll work...@@HeavyMetalorRockfan9
There is also the idea that injuring an enemy soldier is more effective then putting them down.
With injuries you take more people out of the fight. Think about what it takes to get a soldier back from the front lines. All that equipment and manpower isn't there to shoot back.
I just realised that Adam sounds like Herr Flick from Allo Allo at 19:30 🤣
That lie detector test could have easily failed, if they just went with the mindset that they didn't actually steal anything, but borrowed it for the episode.
A bit like how the MRI detector basically maps the blood flow. Which is higher when your brain has to work to make something up. On the other hand, a lie that is told often enough can be recalled as easily as any truthful memory.
I wonder how long their bus trip was. 😂
21:10 the test results fall anywhere from 80% to about 99% inaccuracy
Wouldn't this Steam Powered Machine Gun work better with steam pressure behind the projectile, its easy to do, using the rotary valve principal on the shaft would make it much more powerful and accurate, a missing part of the design ?
I always remember this episode because of that machine guns sound
14:04 Hover-Hynemann
Wait I thought polygraph questions should be only yes or no questions? Why is there math?
No, they will ask lots of different types of questions, including forcing you to lie.
1:27 Ooooooof.... 😬
I know it would probably not be leathal but the amount of blunt force trauma one of those bullets could cause would probaly still take you out of the fight. Yes a sledgehammer to the chest might not make a wound but that does not make you okay or nessisaly alive afterwards. The pellet size seams to have been ideal in transfering all the energy to the target nevermind penetration
Good to know. Only 80 to 99% of polygraph criminals are actually guilty...
under interrogation Grant was forced to admit using ballistics gel to create robots with realistic human breasts, thats why they switched to using pig carcasses
I love these guys! Thank you, Mythbusters, for the greatest show ever.
"that sounds like a maschinegun" and I expected an AFT guy appear out of thin air and shoot a dog.
I mean ... no, it doesn't need to kill. If it can injure that's also useful in a war. Imagine getting hit in the face with such a ball - and not just one but multiple times... you probably won't be fighting any longer.
Wouldn't a longer barrel make the gun More deadly so that the balls have more time to build speed when slingshotted out?
fun test
man i myss busters
Shirtless Jamie awakened something in me...
I wonder how much they spent for the busride.
I'd be willing to bet the polygrapher had them all pegged before they even took the test.
Yeah the problem being that they knew someone was lieing, meaning at this point their chances for success was that much higher and most likely more based on opinion than facts.
😂😂totally relatable, I’d dam near kill myself but don’t make me catch the bus 😂😂
Damn Tory was proper mad the whole ep haha
Man i could never beat a lie detector. I'm so nervous all the time while talking to other people that a lie detector would always think i'm lying, even if i'm not.
Then you've beaten it. If control truth statements flag "lie" - then it's not telling them anything.
Maybe they'll get you by using the tarot cards or dowsing rods (oh sorry, those are just for detecting bombs. [Look it up!😮])
I'm surprised they didn't ramp up the steam machine gun to see what it would take to make it lethal
Well the thing broke, I guess with it being able to spit the bullets this far you could increase the weight and hope it carrys more force, but a higher diameter would also cause more space for said force to disperse upon impact.
I actually believe this thing is lethal, yeah one hit might not kill you but a barrage of steelballs raining down range breaking your legs, arms and rips are effectiv enough.
Asking the US police about the efficacy of polygraph tests is like asking a burglar if you should lock your doors. Very weak episode, sadly.
It was just propaganda by the MB to subvert others and make them believe amerinazistan is democratic
45:12 But imagine the horror a weapon of this sort might induce in the opponent that doesn't know but fears it might kill.
And what about evidence?
MUITO BOM!!!!!
Human analogue - Hamalogue
Right to remain silent applies to a polygraph test?
Yes it does but since you need to agree to polygraph test, in best case scenario you would look like ldiot that you agreed to it and then not answering and in the worst case you would look suspicious af and become suspect no. 1.
I wonder if Tori took the ring.
Why they did the Lie detector test is beyond me. We have test data that proves they don't always work but have a very high success chance. But in some cases a panicked person or a person without emotions can clear or fail parts of the test.
That's just mythbusters. It's not really about relying on research data, but to try it themselves to have a fun episode. Like for example, the fart episode. A simple internet seach would have lead them to research papers about what farts are made of. But they bothered creating fart catcher and went to a lab to test it.
I miss old Jamie
Soo 6x11-15 is 54? :D
Did they really take a bus?
My thoughts exactly. Over 3k miles ? That's probably 3 days worth of traveling. That's a lot.
@@matoatlantis I was curious about the time it would take as well and had to look it up. Tickets were available to two different buses as of writing this comment, and the faster one was 67 hours. That's a long damn time spent sitting in a bus. Costs over 400 clams as well. At that price, let alone length, I can't imagine anyone ever doing that voluntarily.
99% is not even enough of a percent chance. that mean 1 in 100 people is innocent.
It's a bogus stat anyway. Bet they were very happy to get more free advertising by having the show say "Hey look out, this test is still super accurate and catches everyone who committed a crime"
It's a feedback loop of keeping to convince the public the polygraph is infallible so that they get nervous and stressed when undergoing it.
they said they were small wookies in episode 3.... there was no small wookies in episode 3. return of the jedi is episode 6............................
Adam was a bit chunky during this time.
makes me wonder (and a bit scared abut my tests) that they didn't find anything wrong with Grant during his MRI.
I mean this episode was probably filmed a bit over a decade ago so that's most likely why
This was filmed quite a long time ago.
Amazing...i watched this episode as a teenager and when I heard about Grant death few years ago, I almost immediately remembered this episode and had this same question...
Cant detect an exploding bloodvessel 10 +years before it happens
If you did the most basic bit of research you wouldn't have to wonder nor worry
Adams' "timer" didn't work
The worst part of Mythbusters was the editing. They show the best parts happnening 10 times before it actually happens. Destroying all excitement. By the time the clip comes by, you know by heart, whats gone happen.
sling or sling shot; two different things
Fun fact: the guy who "invented" the Polygraph was lying, his wife came up with the idea.
Except he didn't get married until after he invented it. Funnily he got married to one of the women that was a suspect in the first case he tested it in. After that case he didn't believe it worked to a high enough accuracy to be used for criminal conviction. It's actually a really interesting story of a well intentioned invention getting twisted into something sinister.
13:45 i call it my ovary
Banijay Science uploads faster, I wish this channel can upload even faster and the old seasons.
But Banijay has crap audio most of the time.
what is a 2 way mirror? does he mean a window?
i knew he would beat the machine. i could also. pretty easy
It's not really tricking a MRI test if you took a watch instead of a ring, you still took something which was why it detected it. All 3 were actually caught and it did the job.
I love adam but dang, I always skip his impersonations. 😂😂😂😂
Now that we know just how straigned the relationship between those two was... the "Yeah, stop talking, what's the pressure" comment should've been a red flag at the time this aired.
Guess this must've been one of those days where Adam was goofing off a bit more than Jamie could tolerate... it _is_ a frightfully dangerous contraption they're standing right next to right now.
Not really a red flag think about it a potential bomb/rocket near you and one of your guys is goofing around while he should monitoring that pressure.
If you were in his place you'll be bit of pissed/nervous if another guy is doing something else than watching that killer pressure.
with the steam gun, next time look at the papers how to build it. the reason it hit the wall loook at the papers how the front looks like. thats how the bullets comes out of the gun
A pellet gun has the projectile moved by the compressed air itself. This thing only uses rotational force. The steam does not propell the BB's it only powers the motor.
kinda weird that you cane kill a pigeon or rabbit whit a pellet gun that uses compressed air aka BBgun so
i think they used to heavy ammo that reduces the speed and impact,
also the flaw in the design of swinging instead of kicking
take a pinball table for example and compress those flippers
The Crosman Benjamin .357 air rifles have been used to take Cape Buffalo, Wildebeest and even crocs. Air guns aren't gentle by any means. I reckon a steam gun would work simply by venting the steam down the bore, it'd essentially be a spicy airgun. A basic cam release and hopper style mag could turn it into a machine gun. Again, we have full auto airguns, in airsoft we have CO² powered GBB rifles and pistols with ridiculous rates of fire.
All the mechanics say a steam machine gun would function and could in fact be made a lot simpler.
The blood vessels in grants brain was is success
But unfortunately was also his demise
The only thing this show really proves is that book smarts and bits of paper with your name on it can not compare to real world experience and practical skills.
You shouldn’t monetize stolen content
Correct, what does that have to do with the official myth busters account uploading their own content?