Funny Joke

A man walks into a bar on the 51st story of the hotel he is staying at. He sits down next to a drunk guy who says; "you know that window over there?" (points to a window across the room) "if you jump out you fly back in.
"Prove it" the guy says. so the drunk guy dives out the window and flies back in.
the guy is amazed and immediately jumps out of the window.
he falls to the ground and dies.
the barman comes out of the kitchen and says
"Superman, your a real f*ck-up when your drunk"