Well you're 100% correct. I was an idiot when I did that jump. That was my first 2 weeks of training, first day me and some friends went out with a camera. I don't think it's a matter of control of the roll. Once my shoulders got forward my roll was fine. My legs, as can be seen, were not in shape for what I did, and could not absorb the impact to allow my body to recover properly from the jump. But that was over a year ago, my legs can take that impact now thanks to conditioning and progressive drills. (The question is.. can my ankle? )