A man sits at a bar 20 stories up, drinking. Suddenly he jumps out the window, but walks up the stairs a minute after. He does it again, takes a drink, jumps put the window, and emerges from the stairs.
One of the other customers askes how he does it, and he just answeres "just take a drink a jump." the other guy takes a drink, then jumps out the window.
The bartender shakes his head and says "that was mean Superman"