Nice man, glad you liked it.
I tried the rapid deceleration today and I felt a burn in my quads, even though I think I decelerated more quiclky than i ever have before. I'm definitely gonna keep it up although I may need more recovery time.
On a serious note, I've always been a risky person attempting, or at least thinking about attempting dangerous things. Also I'd like evidence that this shit is actually bad for your knees, and bending them past say 90degrees is also bad. Also if you look more closely at my first drop jump, I shift my momentum forward very quickly so the load isn't on my knees as much as it seems since I push forward with hips.
Also the goal is not to crush the ball in the eccentric pistol squats. It is simply to train the nervous system to handle large loads, and overload the movement eccentrically. The ball is a form of cheating since you use it's momentum but you will still generate more tensino than you would in a box single legged squat since the weights you use are much greater. I don't even do these anymore though. It should be a box squat on one leg on a swiss ball.