My particular fascination right now is in vibrations. When I'm in the zone, I've found that I can move in ways that I never imagined, and the feeling is pretty incredible. Suddenly some of the things that I heard about internal circling from a particular (somewhat crazy) tai chi teacher, years ago, starts to make sense. When my legs are moving in tiny little circles at a rate that I absolutely can't consciously control (and I'm pretty sure are roughly in sync with a high multiple of the beat), I don't know... it's mind-blowing. Yeah, strange. You have to be there, I think.