Yeah. . .
I don't believe it.
Not without some sort of collusion, conscious or unconscious.
Chris, what do you think would be occurring in such a situation?
This talk about the ground reminded me of Matsunaga's question.
It's one of those things that's done, IMO, because it looks good for demonstrations, and because it shows something specific (nothing wrong with with that). I wouldn't take it for a practical combat method, but that doesn't mean that it's "fake" either.
Anyway, he's showing (IMO) what happens when forces come into contact with a body conditioned for Aiki, and a somewhat more sophisticated relationship with the ground.
Cady - IIRC correctly the connection between ILC (which comes mostly from Southern arts) and Bagua (which is more of a Northern art) is kind of hazy, one of those things that may or may not have happened.