by Interloper on Tue Apr 03, 2018 4:44 pm
What he is doing isn't "internal," but rather a coordinated use of external movement and timing. Open-close (kai-hei) of the hips to rotate around his vertical access, in rapid synchrony with his partner's attacking movements.
An internal version of this would be to first make a "Yin"/"In" absorbing of the attacker's force, in and down to the ground, which would draw the attacker in and uproot him; then, kai-hei to take him off line and lead into a take-down, throw, or whatever. Or, to use the "Yang"/"Yo" to repel the attacker's force, which would propel the attacker away (and, if desired, downward) and break his structure backward, then collapse him to the ground, or use kai-hei to offline him first, etc. There are a bunch of variations on this theme, and there are many more options when you have an internal methodology.
If his students knew how to absorb or repel incoming force, their bodies would not break/curve backward or stagger backward on impact. They instead would remain unmoved, channeling the incoming force to the ground like a "lightning rod." But they will learn the "external" response of timing the opening/closing of their hips, rotating around their vertical axis, and remaining relaxed, and that should work just fine for them, too.
Pariah without peer