You can only feel sorry for this kid because whatever he does in this situation, he’s screwed. He either stands there and takes a beating from a girl on camera or he hits back and gets a horrible reputation as the guy who beats up girls. He simply cannot win:
Also have a feeling this kid really has no idea where her phone is, though even if he did that obviously doesn’t warrant her reaction. She should thank her lucky stars he had more patience than this dude did.