I've Heard Cars Can Run On Water But ....

Sister Mary Ann's Gasoline.

Sister Mary Ann worked for a home health agency and was making
her rounds visiting homes, when she ran out of gas. She walked to
the service station only a block away. They could not help her
as their only gas can they had been loaned out but she could not wait.

Sister Mary Ann returned to her car and looked for something to hold gas
and spotted the bedpan she was taking to a client. She took it back to
the service station and gets it filled with gasoline.

As she was pouring it into her tank, two Baptists were watching from
across the street. One turned to the other and said:

"If it starts, I'm turning Catholic."