This girl is walkin around one of those big revolving bars on the top of a skyscraper, looking for a one nighter. But she comes to the conclusion that all the guys are losers, so she sits down at the bar and sees what happens.
As time goes by, eventually she is the only person left in the room, apart from this one guy sitting at the table. She goes up to him and he strikes up a conversation.
"Hey, you see this beer?"
"yes..."she replies, expecting some cheezy chat up line. "Its magic beer" says the guy.
"What a loser" the girl thought until the guy took a sip of the beer, got up, and said "watch this"
He proceeded to open a window, jump out of it, fly round the whole bar, come back in the window, and sit back down again.
"Wow!" said the girl.
"I told you it was magic beer" said the guy
"let me have a go" said the girl, so she took a gulp of the beer, opened the window and jumped out.......and plunged to her death.
The guy looked up at the bar tender and sniggered.
The bar tender looked up and said, "Superman, you can be such an asshole when youre not working"