Two guys square off in a locker room. The one on the left is the obvious instigator while the kid on the left appears to be trying to diffuse the situation, which the thug will not allow him to do. He squares up in a fighting stance a couple of times and makes his hands into fists. He’s spoiling for a fight.
If you are like me, you have seen similar situations like this many times and often the antagonist gets much more than they bargain for. Smart bullies intimidate their victims and then back off. Evidently, this one isn’t too sharp.
Finally the one being bullied has had enough and he attacks like a fierce wolverine and his friends have to pull him off the bully before he seriously injures him. Personally, I would have liked to see him continue in hopes that the lesson would sink into his thick skull.