Stephen Hwa's one inch punch is similar to Bruce Lee's in terms of "time delay" (no time to step back from punch) it is different in terms of Bruce's "momentum force" and Stephen Hwa's "internal energy". Also different in terms of "explosion" vs. implosion", stance of persons giving the punch and stance of persons receiving punch. Although Bruce Lee's "1-inch" punch was an "explosion" on the outside of a body, the person had a "time delay" so there was no time to react, to step back to relieve the power from the strike (he hit the person on the solid chest, a large stance, back foot heel leaves the ground, seems "momentum" based). Stephen Hwa's is an "implosion" on the inside of a body, the person had a "time delay", no time to react, to step back to relieve the power of the strike (hit the person on the belly, an extremely small stance, both feet stay on ground, "used a quarter body move, no "momentum") What seems like "sci-fi" is the "implosion" involves a "time delay" and a "time constant". In visiting him in Florida I had a discussion with Master Hwa who is a Ph.D. chemical engineer. This got really interesting for me about terms like "time delay" that he refers to in the video. My layman's understanding is that all materials including human bellies also have a "time constant" in their elasticity. Well, in this case, the force is coming at Tom as Master Hwa later says with so much force, so much speed it creates a "time delay" (irrespective of the "time constant") in Tom's body going backward. Measuring how far the punch penetrates during and after the pad is really only about 2 or 3 inches of compact movement. Regardless of that it still penetrates into Tom's body and one might say completely. I call it an "implosion", on the inside of Tom's body as opposed to an "explosion" on the outside. He receives the whole force before his body begins to move back, so much for "pulling the punch", don't you think? It is aptly called a "spike" of power because like a spike, the opponent's body has no chance to get away from the full force.
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