Originally Posted by osopardo

'Cause you'll be punch drunk and nerve-dead.

Hey, I've got an idea! Get your sparring partner to hit you in the face repeatedly until it doesn't bother you. Start out soft and progressively let him hit harder and harder. Eventually, you won't feel anything - 'till they revive you.

Or if you don't have a sparring partner handy, just slam your head into the heavy bag or the speed bag or even the wall. Everybody at the gym will be like totally impressed!