[Yoda]

What I was visualizing was the the hinge pin from the head down through the spine. This can't be cause the hip motion (shifting and possible turning) would move that line, saying it started in the center, it certainly would be their at impact.

And don't forget, Martee, the Tripod exists despite any Body movement between the Head and Feet. Per Homer Kelley:

"The important thing is that the true Swing Center -- for all components -- is around a Hinge Pin with one end at the top of the Stationary Head and the other in the ground precisely between the Feet, with no regard for Body Location or Position at any time."

This is the Hula Hula Flexibility of 7-14.