This Canadian finds the machine's center of balance and rocks it until my food falls loose. ;)
No damage to the machine, almost always works, and I don't look like a psycho who can't control his temper even as an adult.
(Note: helps to be heavy/strong enough yourself to shift the machine's weight).
@Hinoron Takes a lot of self control. I always get mad and yell at it, then go find someone with a key so I can get my money back. And the snack, for stealing my change.