A guy walks into a bar at the top floor of large skyscraper and asks for a strong one. He drinks up and asks for another one. After quite a lot of drinks he walks over to a table where there are two men sitting, talking and drinking. "I'll bet you guys 5000 bucks I can jump out that window and land safely on street below!"

The two men look at each other then agree to accept the bet. So the drunk walks to the window and jumps out. The two men can hardly believe their own eyes when they see him land safely on the street and again enter the building. "How'd you do it?!" they ask in amazement when he enters the bar again.

"Well, you see." the drunk replies. "There is this ventilation shaft straight below this window, and the stream of air is so strong, it slows you down enough to land safely on the grid. Why don't you try it yourselves?"

So, both the men hurry to the window and jump out, facing certain death as they hit the street at high speed.

At this point, the bartender walks up to the drunk and says: "You know what, Superman? You can be a real bastard when you're drunk!"