awesome! clean form! 
His form is as tight and clean as possible, however, just seeing how he locks out his knees on the concentric portion of his legpresses, I know his knees are taking a beating.
I can't imagine maxing out and doing that. The point is to keep the strain on the quads, lessening the chance of any knee problems, but the way he does the movement is so violent that I wonder how his joints hold up.
I understand why he does the reps fast, but that doubly makes it important to avoid locking out and keeping the negatives slow. He's really taking a chance here....
DIV