The second guy says, "What, are you a nut? There is no way in hell that could happen". "No it's true". The first man said, "let me prove it to you". He gets up from the bar, jumps over the balcony, and plummets to the street below.
When he passes the 10th floor, the high wind whips him around the building and back into the 10th floor window and he takes the elevator back up to the bar.
He met the second man, who looked quite astonished. "You know, I saw that with my own eyes, but that must have been a one time fluke". " No, I'll prove it again", says the first man as he jumps again. Just as he is hurtling toward the street, the 10th floor wind gently carries him around the building and into the window". Once upstairs he urges his fellow drinker to try it.
"Well what the hell, the second guy says, "it works, I'll try it!"
He jumps over the balcony, plunges downward, passes the 11th, 10th, 9th, 8th floors...and hits the sidewalk with a SPLAT!
Back upstairs the Bartender turns to the other drinker, saying, "You know, Superman, you're a real asshole when you're drunk".