One night Paddy runs into a bar feeling as though he is going to explode.

He runs up to the bartender and asks where the bathroom is. He says upstairs, first door on your right.

So the man runs up the stairs and can't remember what the bartender said.

He thinks if he goes to ask again he might not make it. So he looks around and sees a hole in the floor.

Feeling daring, he pulls down his trousers and heaves out a dump. When he returns, everybody except the bartender is gone. He asks where everyone went.

The bartender replies, "where were you when the shit hit the fan?"