This was animation practice I did a while ago. The rigs are dead simple geometry on top of the default XSI skeleton. Sure, no facial details, but excellent playback speed and quick to render and capture.
It took me a fair while to get the ending of this right. I had particular trouble with the fall. I'm pleased with the end result, though next time round I'll have a better think about the scene itself.
This would work better with the characters the other way around.