Drinking, and heights

A man rides the elevator up to the top floor of a restaurant in a big city, it's one of those skyview places that overlooks the city, and orders a couple of shots. He Drinks them, and then runs over to the window and jumps out. A few minutes later, the same man returns, and orders a couple of shots. He then runs to the window, and jumps out. A few minutes later, the same man returns again. A businessman staying at the hotel walks up, and asks the man how he keeps returning unharmed from his leaps out the window.

"Well, since alchohol raises your body temperature, and hot air rises, you just hold your breath, and float to the ground" Amazed, the businessman orders a couple of shots, and after drinking them, runs to the window, and jumps out, promptly splattering on the sidewalk below.

The bartender walks to the first man and says "Jeeze superman, you sure are an asshole when you're drunk"