Okay, there are two drunks in a bar.

Drunk 1: Hey, did you know if you jump off the top of this building, you can fly?
Drunk 2: No way.

Drunk 1 takes his erstwhile friend to the top of the building, and, with a grin, he jumps off. Down he plummets, and right when it looked like he was about to hit, he suddenly swooped up. After doing a few laps around the roof, he landed.

Drunk 2: That was awesome! How'd you do it?
Drunk 1: The wind currents are special here, my friend. Now you try it.

Drunk 2 jumps off, falls down and splatters on the sidewalk. Drunk 1 gives a smile and goes back down to the bar. He looks over to the bartender and orders another drink. After a couple minutes, the bartender looks out the window and gives a grimace. Handing the drink over to Drunk 1, he leans over and whispers, "You're a real jerk when you're drunk, Superman."