This guy needs to use the bathroom really badly - he's almost shitting his 
pants. He goes into a bar, where its really crowded, and everyone is having 
a great time. He looks around everywhere, but there's no bathroom in sight. 

However, he does spot a little set of stairs in the back, so he goes 
upstairs, and he finds himself in a little room, with a hole in the middle 
of the floor. Well, this guy REALLY has to go, so he looks around, drops his 
pants, and quickly does his thing in the hole. 

Once he's done, he pulls up his pants, and saunters downstairs like nothing
happened. When he gets downstairs, there isn't anyone there, and the bartender
is crouched under the bar. Well, the guy asks the bartender, "Where is 
everyone?" 

The bartender says, "Where were you when the shit hit the fan?"