"Fan" joke

There was a man that really had to take a shit, so he
went into a nearby bar and asked the bartender where
the bathrooms were. The bartender said, "Go upstairs
and it is the 2nd door on the right." So the man went
upstairs and couldn't find the bathrooms anywhere. He
looked in every door there was. He really really had
to take a shit by that time, so he saw a hole in the
floor and he decided to take a crap in it. So he went
ahead and did his business. After he had relieved
himself, he went back downstairs and noticed there was
nobody in the bar. He asked the bartender, "Where did
everybody go?" The bartender replied, "Where were you
when the shit hit the fan?"