A man walks into a bar on the third floor.

He sits down and orders a double vodka on the rocks, smashes his head three times on the counter and jumps out the window. A minute later the man walks back inside and orders another double vodka on the rocks, bangs his head on the counter and proceeds to jump out the window. When he again walks in the door, one of the patrons walks up to him and asks: "Excuse me, but how are you able to survive that fall?" The man replies: "If you are able to drink a double vodka on the rocks and bang your head on the desk three times you can do anything." The other patron says to the barkeep: "Give me one, I need to try this." He proceeds to down his drink, bashes his head and jumps out the window. The barkeep says to the first man: "You're cruel when you get drunk superman."