All right, this is one of those What Would You Do? kind of questions. My friend backstabbed me, just came into the room, (the day before, I was joking about him, he does it to me all the time) and punched me in the arm, and took his keys and wedged between his knuckles, almost hit me in the stomach, and he started taunting me, and he weakened me, couldn't do nothing. I think I should be a vigilante and do something. I think since he caught me by surprise, I should too. Doing nothing won't help, he'd think he won.
Probably back for real.