see how slow he squats...
400 lb. Squat Clean Jerk - YouTube
If you think what you performed is anyhting like the technique used in this guys video, you need to take a closer more critical look. He pops the weight gets under it quickly and rebounds using a 12-18 inch range of motion. You dropped like a stone from full leg extension with no control of the weight. You are lucky both knees did not go with the quad. Pull up some video of Shane Hamman. He too drops quickly to utilize the rebound effect but he remains under control. It is not a freefall. You had no control what-so-ever once your legs unlocked. Quite honestly I cringed when I watched the video. Get healthy and then get some help with your technique. There is no doubt you are a strong guy.
Everybody loves a comeback!!! Best of luck to you
PWR