Bully

[Reasoner]

Sad thing is, the victim ended up being the bully.

Not true, the victim fought back for good reason, he was being bullied right there and being punched/ridiculed, after what was most likely long period of time of being bullied he snapped in anger... It's not like he then picked on the kid afterwards, this was more of a defense.

It's easy to say violence isn't the answer, but I cannot see how any words would have helped effectively.