She goes over and asks him what he’s drinking.
“Magic beer,” he says.
She thinks he’s a little crazy, so she walks around the bar, but after not icing that there isn’t anyone else worth talking to, she goes back to the man and says
“That isn’t really magic beer, is it?”
“Yes, it is. I’ll show you,” He responds, and jumps out the window, flies around the building three times, and comes back through the window. The woman is amazed, and immediately asks for a magic beer of her own.
The man says to the bartender, “Give her one of what I’m having.”
She gets her drink, takes a gulp of beer, and then jumps out the window, plummeting 30 stories down.
The bartender looks at the guy and says, “You know something?”
“You’re a terrible person when you’re drinking, Superman.”