Looking at ur video, i can now see y ur knees hurt while landing. First of all, as urself: how on earth can breakers do no-handed kip-ups? Tough question, isnt it? They use their legs 2 get the 100% of their accelerational momentum. Now, coming back 2 ur kip-ups... U r not using ur legs at all. Ur just lifting them up and flopping em on the ground. U r mean 2 kick ur legs DAMN HARD. I specified this fact in
my guide many times. Its all in ur legs, son. My full use of them and kick them as hard as u can! If u look at my kip-ups video (in my guide), u will see that when i am doing a kip-up, while in airborne, my legs r nearly straight. My momentum makes them straight. So, use ur legs for the momentum. Good luck. Peace
Break Master