An American, an Australian and a man of uncertain nationality stand at the very top of the Empire State Building. The American says to the others, “Did you know that the updrafts up here are so strong that if you jump over the edge, they’ll blow you straight back on to the roof?”
The man of uncertain nationality says, “Not a chance. You’re having me leg”.
The American says, “No, it’s true. Here I’ll prove it”. And then he leaps over the wall surrounding the edge of the roof and falls from sight, before shooting back up and over the wall, and landing at the feet of the other two.
The man of uncertain nationality says, “Fuck me. That’s incredible! I’ve got to try this out”, and he jumps over the wall and plummets to his death below.
The Australian turns to the American and says, “Jeez, you’re a bastard, Superman”.