A guy walks into a bar and sees a weird guy sitting at the counter. He goes over, sits down and asks him what he is drinking.
"Magic Beer", he says.
He thinks he’s a little crazy, so he walks around the bar, but after that there is no one else worth talking to, goes back to the man sitting at the bar and says, "That isn’t really Magic Beer, is it?"
"Yes, I’ll show you."
He takes a drink of the beer, jumps out the window, flies around the building 3 times and comes back in the window.
The guy can’t believe it: "I bet you can’t do that again."
He takes another drink of beer, jumps out the window, flies around the building three times, and comes back in the window. He is so amazed that he says he wants a Magic Beer, so the guy says to the bartender, "Give him one of what I’m having."
The bartender gets him drink and he takes a gulp of the beer, jumps out the window, plummets 30 stories and breaks every bone in his body. The bartender looks up at the guy and says, "You know, Superman, you’re a real jerk when you’re drunk!"