I read a long account of what I believe you were refering too, 504mikey. It was actually Chiba sensei, and according to the first hand account that I read, the two were standing there for a bit, Chiba reached out and tried to force a kotegaeishi, there was a snapping in the wrist as the tai chi master through Chiba across the room. Then their students got in the middle to break it up. Hope this helps to clarify something a bit.