The voice mainly comes from the back of your throat. I'd definitely recommend doing it when you've just woken up, it gives your voice an extra bit of gravel, though also don't try too hard to do an impression. If you try too hard to sound like the character, it can often end up sounding less like the character.
This is very convincing, I doubt I'd be able to tell it's an impression if the title didn't say that.
This is really good, any tips to do an impression myself?
The voice mainly comes from the back of your throat. I'd definitely recommend doing it when you've just woken up, it gives your voice an extra bit of gravel, though also don't try too hard to do an impression. If you try too hard to sound like the character, it can often end up sounding less like the character.