That's just Kyle. Also as a QB, you'd love that your O lineman tried to tear some guy's head off for messing with you after the whistle. I remember a lot of ex-coaches turned commentators giving him props for this one.
I used to live across the hall from Kyle. Despite his intensity, he's actually a nice guy and a better surfer than football player. However, he has his moments of anger like this. One time we had a party when he was away in our complex...DJ in the parking structure down stairs, three stories of parties in a single complex. There was a ton of broken glass in front of our doors. We had a lot of people inside our apt due to a number of bongs. When he came home, he immediately stormed into my place yelling that he'd kill the mother fucker who left the glass there. The party is over and you better clean this shit up now.
I've yet to see a place clean out faster than our apt. My roommates and I cleaned faster than a dude thinking he's gonna get laid.