To all the people who said that his knee never made contact, I was watching this same feed live, and about 2 or 3 minutes after the end of this clip, they go back to look at it again from a different angle, and you can CLEARLY see his knee hit the guys head. After watching this clip live, I was left also scratching my head because the last replay makes it look like he missed. I can, however, assure you that he made clear contact with his knee to the head of the opponent. The other big thing is that it is about 2-3 seconds AFTER the whistle. This was the right call. No place for cheapshots in the game.