I was looking for the play. I don't think this is the same one. It is similar, from the reverse angle, but #98 isn't in the shot, so I think it's actually a different play. Anyway, it's interesting because Judon does something similar on this play...after Allen hits the ground, he swipes at the ball even though there's no actual reason to swipe at the ball...in real time, however, a ref won't blow the whistle because it doesn't look dirty. If I had to guess, I'd say this tactic is somewhat of a hybrid between unnecessary/somewhat dirty if contact is made and a desperate hope that the ball was already loose to force a fumble. I'd hardly say it's a really dirty play like a blatant Larry Bird/Dr. J punch though.
So yeah, we already saw from that earlier play that Judon tripped Allen. He's one of those guys whose going to do everything he can to get into the opponent's head and also try to get every possible edge.
I used to play basketball in high school, and one time we were playing this team...every time I'd pass the ball, this kid on defense would either jab me pretty hard in the stomach, or he'd give me somewhat of a titty twister (grab my nipple and twist...really quickly and fast...****ing hurts.) He figured out that the refs don't see it since they're focusing on where the ball is going. Players at higher levels do all kinds of tacticts like that...like extra shoves, etc. when they know they can get away with it. I ended up doing the same thing we played that team again...after I passed the ball on the first play, I elbowed him in the face.