Nick is drinking in a hotel bar on the 14th floor and gets chatting with another guy in there. The other guy says "You know, if you jump out of this window the wind rushes past the building in such a way that it picks you up and whisks you into the 10th floor window"

"What? That's crazy" says Nick "You'd fall to your death!"

Before anyone can stop him, the other guy takes a running jump out of the window. Horrified, Nick runs over to watch and to his surprise, as the man comes to the 10th floor the wind sweeps him in through the window. He gets into the elevator and comes back to the bar.

"Wow that's amazing!" says Nick "It's got to be a fluke!"

The other guy smiles and jumps out of the window again and at the 10th floor, the exact same thing happens again. Nick is amazed and decides he has to try this too so before anyone can say anything, he takes a running jump out of the window, falls straight past the 10th floor and lands splat on the pavement.

The barman turns to the other guy and says "You know what Superman? you're a real b*stard when you're drunk"