Sister Sarah is a Nun and a nurse doing her rounds of patient's when she runs out of petrol. Luckily a petrol station is nearby, but its only petrol can is out ...on loan. The Nun goes back to her car to find something in her car to use instead. Always resourceful, she spots a bed pan, carries it to the station, fills it up and returns to the car. As she is pouring the petrol into the tank, two men see her from across the road. One turns to his pal and, amazed, says "if that car starts, I'm turning Catholic".