A man walks into a bar located on the 10th floor of a skyscraper

He sits down and asks for his usual "special" drink he drinks it, jumps out the window flies around the building and re-enters through the window and sits back down. A woman sitting next to him, reasonably shocked, asks him how he did that, the man replies that "its all in the drink". The woman eager to have a try herself orders the same drink, downs the whole thing, jumps out the window and proceeds to crash on the ground, instantly dying. The man laughs, in tears. The barman tells him: "superman you can be a real asshole when you drink"