a guy walks into the bar orders a odd kinda drink. The man gulps it quickly down and jumps out of the window (5th floor bar). a minute later he walks in the bar again and orders exactly te same drink, swallows it in one shot and jumps out of the window.

few minutes later he walks in the bar (again) now a guy who has been sitting there for some time asks the guy how he could survive that jump from the 5th floor in wich he replies that it's the drink that does the trick. he orders another drink and says: "go ahead try it". the man hestitates but finally drinks the drink and jumps out of the window.... and died.

the bartender then says to the other guy: "superman your really a jerk when your drunk"