That was ******* awful... You really ought to boil yourself alive for ten minutes and then drink two gallons of bleach just to purify yourself of that absolutely terrible ******* pun.
To me it looked like a fit of glee that functiined independent of the ball. He was kinda standing there then decided "today we fall with pride" and made it happen.
here's what I could find on it: www.goatstream.com/research/papers/SA2013/ it's basically just a 3D representation of muscles and how a bipedal body would/could use them, goes through a few animal bodies too.
so... he was supposed to grab the wheel and then push himself over to offset the torque by turning the wheel but he missed the wheel and just pushed himself over?