My Best Friend Is a Vampire (1987)
Jeremy Capello: [after ordering lots of meat and then a pint of pig's blood] Uh.. how much for just the blood...?
Butcher: [grinning] First time, eh, kid?
Jeremy Capello: [believing that someone is following him, he has ducked into the freezer and taken Darla with him] Don't let him see you leave the freezer!
Darla Blake: [sarcastically] Oh, noooo problem; I'm carrying a can of invisible hairspray!