I don't know. I remember that moron on the Bears, after the Pats were blowing them out, after celebrating a sack while still being down 50-20 or something like that, jumped in the air to celebrate, and landed funny like Nelson, and blew out his knee. Nelson came down really strangely. Also, maybe I'm just getting old, but why the hell was Nelson jumping for that pass. If he just stays on his feet he catches the ball, spins and gets more yards. Seems like guys jump to catch passes headed right to their hands.