A guy walks into a bar on top of a ski skraper. He sits down next to a buff looking guy who looks like he had a little more booze than he can handle.
The buff guy looks at the bar tender and then at him and says
`'hey, did you know that this building is construckded in such a way that if I was to jump out the window and the wind would glide me safely to the ground. The man, who decided he could use a laugh said, 'prove it.'

So the guy walks over to the window and jumps out. A few minutes later he walks back into the bar and says, 'told ya.'
He looks at the bar tender who is shaking his head and laughing, and says, 'do that again.' So he does it again. The man astondished walks out to the window and jumps out and falls 100 stories to his death.
The bar tender looks at the buff man and says, 'you now, you are a real asshole when you're drinking, Superman