Jokebook: Windy City

A guy walks into a bar and sits down next to an old man. The guy orders a beer and drinks it, then gets up and jumps out the window.

A few seconds later, the guy comes floating back into the bar.

The old man asks, "How'd you do that?"

The guy says "Oh, there's a draft outside the window. If you jump out, it catches you and blows you back in."

The old man says "I've gotta try that" and jumps out the window. He doesn't come back.

The guy sits down and orders another beer.

When the bartender sets the beer down in front of the guy, the bartender says, "You sure are a mean drunk, Superman."