Quote Originally Posted by Noctivagus
Today at work, about 10am I saw this guy hit his girlfriend, so I walked up to him and basically hit him, returning the favour as Hyperbole put it.
First off, good man. I'd like to shake your hand, there aren't too many other people who would do that. We should form a club, or something. And use that club to beat people that hit innocent women.

Secondly... As much as that reflects on your character, it's probably not a good idea if you don't know the person. Because...well, they could be brothers with a psychotic drug dealer with eight friends.

And, as ... that guy said. Your friend may not have known the entire situation, so check that out before you consider it a betrayal. Hell, he might have thought you knew the guy and he was just trying to see you to talk, or something.