They just do when you extend or contract the wrists.
I assume you are running this under 2.6b?
If not, then of course it won't work unless you fracture your wrists, in which case it might...
You know, I really wish I had a shotgun, so I could go back in time and kill you before I watch that.
Oh wait! I didn't watch it.
So there!
Yah, all there is to say.
i just made uke's corpse have perfect balance without even moving uke! I cut off his arms and head, then he's all relaxed, and he balances perfectly on his feet!