Two nuns driving through Transylvania at night, when suddenly Dracula jumps on the bonnet of their car, the nun driving tries to shake him off, to no avail, her driving becomming more and more eratic. Then she tries to blind him by using the windscreen wipers (anti freeze) but again to no avail, she turns to the other nun at the side of her and says " Show him your Cross, Show him your Cross", so the other nun, opens the window sticks 2 fingers up and shouts "Get off the fucking car you knobhead"

and oldie but a goodie!!