Not necessarily a "dirty" hit, but it looks reckless to me. More finish on that hit than was needed, IMO. I think the thrust of the arms and the "follow-through" of the hit show a disregard for safety. He came close to putting his forearm/elbow right through the guy's head.
On a side note, I definitely misread the title of the thread and was wondering how it got past the obscenity filter.
