Is the bullet-catch-in-the-mouth trick dangerous?

[Princhester]

@Sage_Rat

For every action there is an equal and opposite reaction. I.e., the force of the bullet is the same force you feel when you shoot the bullet. If it wouldn’t break your wrist, it wouldn’t break anything else. A bullet is dangerous not so much because of the force, but because of the surface area that it is spread over.

It’s also the distance over which the bullet accelerates. The bullet is accelerated over the length of the barrel. To stop it any more quickly requires greater force. A bullet may not break your wrist as it accelerates along the barrel when you fire it but if it hits your head you can’t afford to have deccelerate through your brain.