Here it is: my personal challenge for the week. The same biped jumping, double kick with a 360, land roll, and kip-up. This was fun. Lots. Seriously. It was a good challenge for me. I really had to concentrate on the weight of the legs and feet. The roll proved to be the most difficult part. I kept adjusting the animation here and there, but it kept wobbling on itself, so i deleted all the keys, rotated the Main biped bone, and it was completely fixed. Sometimes you have to go back to basics. The animation is a bit fast, so I'm going to cut the speed in half, render it, and post it again, fixed.