Continuity mistake: Near the end when the vampires are trying to get into the crypt and Jim Carrey has locked them out, we see two vampires trying to enter the room through one door and others going around to get in through the other entrance. When they get in, the vampires have reversed which entrance they were trying to use - the ones who stayed at the first door enter through the second door and vice versa.
Mark Kendall: Oh, Robin, please?
Robin Pierce: Mark, we've been through this sex thing a million times.
Mark Kendall: Half way through it a million times. It's what people do when they're in love! It's natural. It's right.
Robin Pierce: Well it's not natural or right for me to do it in a car.
Mark Kendall: What about an ice cream truck?