Two men make a bet.

Two men are sitting in a two story bar drinking heavily and rambling on about things that are possible and impossible. The first man says to the other, "well I know for a fact that flying is impossible." The second man laughs and says, "let's make a wager, let's say I jump out of the second story window, land on the concrete, and somehow fly back up, what will you give me?" The first man seeing as this is a perfect opportunity to make some money says, "I'll see your wager and give you $500 bucks if you can do that." The second man says, "fair enough" runs at full speed and breaks through the second story window. The first man in utter shock the man decided to jump ran over to the window to see the aftermath. To his shock, the second man lands on the concrete and immediately springs back up and comes right back through the window. The second man says, "it is possible." The first man in utter disbelief runs for the window, jumps out, and falls splat onto the concrete. The second man calmly walks back to the bartender who has a smirk of disapproval. The second man says, "told you flying is possible," and the bartender looks at him and says, "you're such an asshole when you're drunk Superman."