Really gotta go

  This fellow rushed into a crowded tavern on Saturday night.  Men and
women stood three-deep at the bar.  Our man, who felt nature calling
strongly, looked about him but couldn't see anything that resembled a
john.

  He saw a stairway and bounded up the steps to the second floor in his
increasingly desperate search.  Just as his bowels threatened to erupt,
he spotted a one-foot by one-foot hole in the floor.  Now, at the end of
his control, he decided to take advantage of the hole.  He dropped his
pants, hunched over it, and did his thing.

  Thoroughly relieved and relaxed, he sauntered down the steps to find,
to his surprise, that the bar which had been so crowded a few minutes
ago, was now empty.

  "Hey!" he yelled to the seemingly empty room, "Where is everyone?"

  From behind the bar a voice responded, "Where were you when the shit
hit the fan?"