Two nuns are traveling through Transylvania in their car. They're stopped at a traffic light, when suddenly a vampire jumps onto the hood of the car and scratches at the windshield! "Quick, quick!" shouts the first nun, "What shall I do?"
"Turn the windshield wipers on, that will get rid of the abomination,"shouts the second. She switches them on, knocking the vampire about, but he clings on and hisses even more loudly.
"What'll I do now?" shouts the first nun.
"Switch on the windshield washer. I filled it up with Holy Water in the Vatican!" says the second. The first nun does so, and the vampire steams as the water burns his skin, but he clings on and hisses again at the nuns.
"Now what?" screams the first nun.
"Show him your cross!" says the second.
So the nun rolls down the window and shouts: "GET OFF MY FUCKING HOOD!"