The Call Of Nature
He sees a little bar up the way and he pulls into the parking lot.
When he gets inside, he finds the place is packed! The bar is crowded with people trying to get drinks, women are dancing on the tables nd there's hardly standing room anywhere.
Ernie scans the place a couple of times to find the restrooms, but to no avail. Finally, he spots a small stairway and scrambles up.
When he gets to the top, he discovers that all the doors are locked. All but one. When he opens the door, all he sees is a big hole in the floor. Desperate, he drops his pants and dumps the biggest load he's ever had, right there in the hole.
Relieved, he calmly walks down the stairs. The once crowded barroom is completely empty, not a soul is in sight. Slowly, a bartender rises from behind the bar.
"What happened!?!" asks Ernie.
The bartender responds, "Where were you when the shit hit the fan?"