Two nuns were driving in a car when all of a sudden a vampire smacks into their windshield and hangs on for dear life. The nun driving turns on the windshield wipers trying to knock him off, but to no avail.
She looks at the second nun and says, "Before we left the convent I put holy water in the windshield washer reservoir, which will take care of him!" She hits the button, douses him with holy water and, although he starts to sputter and smoke, he still hangs on, looking more evil and threatening by the minute.
The second nun says to the first, "Show him your crossâ€.
The first nun agrees that is a good idea, so she rolls down the window, sticks her head out and yells, "GET OFF MY FUCKING CAR!!"