Robert John wrote:
Well ok taking this a step further,
say someone takes the pushout posture, only instead of pushing the partner, he "punches" him. How does the angular momentum you describe keep the "puncher" from being knocked back, and why would the "punched" person be knocked back instead?
Remember the person is weakest physically front to back.
I realized that I answered your question in reverse configuration, but that was because the exercise shown on the video suggests that configuration, i.e. -- how the attacker's dynamic is disrupted.
You really wanted me to say how to beat people up this way, is that it??
The short answer is the same -- Maai and centering -- but in reverse... and who ever gives up first -- wins.
The only real difference is who is practicing aiki and who isn't.