A nun was in a hurry on her way to her job at the local Catholic Charity
Hospital when her car suddenly runs out of gas. Luckily, she was only a
block and a half from a gas station, so she got out of her car and
quickly walked there.
At the station, she asked the attendent to give her a quart of gasoline
so that she could start her car and drive it over to fill it up. The
attendent told her that he only had one gas can, and he just loaned it
to someone else.
She told the attendent that she was in a hurry and would look in her
car to find something to hold the gas. When she got back the the car, the
only suitable container she found was a bedpan, which looked like it could
easily hold a quart of gas.
She brought the bedpan to the station and the attendent filled it with
gas. The nun got back to her car and started to pour the gas from the
bedpan into her car.
Just as she started pouring, two men walked by. One of the men said to
the other "If that car starts, I'm converting to catholicism forever!"