His punch was unnecessary. It looks like there was something going on between the two before they got to the actual bar. He was clearly backing her down and it pissed her off. When she raised her fist, that was a warning for him to back off. When he grabbed her hand it became a physical conflict. He looked like the aggressor to me in every way. He comes off as a real dirtbag in that video. I'm not sure how old he is, but as a true freshman, I doubt he had any business trying to buy a drink anyways.
Of course his punch was unnecessary; no one is debating that (that I've seen). What amazes me is how so many people look at the same video and see such unbelievably different things.
I see a woman walking up to a bar minding her own business, closely followed by a man (DJ) headed for the spot to her left. Just as she gets to the bar it looks like DJ says something to the dark haired woman holding a drink to his left as she looks right at him. I'm assuming he said excuse me (or for Gator fans, get the F! out of my way, b#$@!) since she acknowledges him and "sort of" attempts to move out of his way. He then proceeds to squeeze between the woman he just spoke to and the woman at the bar who apparently doesn't like to be bumped into, despite the fact DJ's focus is his spot at the bar. Notice both of his hands firmly gripped to the underside of the bar as he attempts to pull himself towards the spot he's eyeing.
Also notice he's not really even paying attention to the women he's bumping into until she turns around a 2nd time. In fact, as she turns around, her left arm is what turns him towards her (1st contact). She continues pushing back at him with her left arm (notice it up under his chin) while she raises her right fist. He then grabs her arm to keep from being punched in close quarters. She obviously doesn't like being grabbed (heck, she objected twice to simply being bumped into), so she knees him in the groin. Then she punches him in the face.
How does anyone see him coming at her? Heck the first time she swings her head around at him, he's not even looking at her, he just asked the dark haired woman to move? The way he's bouncing back and forth to get to the bar it's pretty obvious there is a crowd pushing him toward that direction. Even when he's gripped the bar with his right hand, he's still looking left, not even paying attention to the woman until she turns around a 2nd time. You guys are crazy!