What are you trying to prove on this thread, anyway? There has to be some fundamental motivation.
Why not just say it?
He is trying to prove that he has nothing to do tonight. Obviously he has some anger and frustration to take out. I've got plans tonight, so I'm heading out, enjoy the rest of the jousting with our clearly not brain dead friend.
Too bad he doesn't have plans tonight, though the ability to make plans relates to having a pleasing personality, so there's probably little hope for him.