Never Cross a Nun

Two nuns, Sister Mary and Sister Helen, are traveling through Europe in their car.  They get to Transylvania and are stopped at a traffic light.  Suddenly, a diminutive Dracula jumps onto the hood of the car and hisses  through the windscreen.

"Quick, quick!!" shouts Sister Mary, "What shall I do?" 

"Turn the windshield wipers on.  "That will get rid of the abomination," says Sister Helen.

Sister Mary switches them on, knocking Dracula about, but he clings on and hisses again at the nuns.

"What shall I do now?" she shouts. 

"Switch on the windshield washer!   I filled it up with Holy Water in the Vatican," says Sister Helen.

Dracula screams as the water burns his skin, but he clings on and hisses again at the nuns.

"Now what?" shouts Sister Mary.

"Show him your cross!" says Sister Helen.

Sister Mary opens the window and shouts:

          "GET OFF MY FU**ING CAR!!"