One-Inch Punch Demo

Bruce Lee coined the phrase "One Inch Punch," and taught the concept well. It is not meant to be a practical street fighting combatant, but rather is just a demonstration of the power of utilizing the entire body to deliver an effective strike. The practicing, perfecting, and mastering of this technique enhances the attacking power of one's self-defense.
The volunteer, Jason, obviously a bigger opponent, was well informed of what was to happen, and grounded himself in preparation. Many demonstrations of this punch may look more extreme, but their subjects were perhaps the same size or smaller, uninformed, and/or positioned poorly (standing normally, without any stance.)
Also, take note that this punch has complete follow-through. Never pull back on a strike. Those that do pull back are simply "pushing," not striking.