I am going to set that as my computer's background and never do anything ever again.
What factors would he have to adjust in the smallest increments to complete a second flip?
a) the force with which he falls backwards once landing on the ball
b) the velocity with which the ball rotates
c) his mass
d) the elasticity of the ball
e) the density of the atmosphere
f) the frictional coefficient between the ground and ball
g) the normalized frictional coefficient between the ball and his feet, shorts, and skin
EDIT: while replying to comments on this post, I accidentally scrolled up. It's still mesmerizing.