Continuity mistake: When Buddy and Cindy are going to check out the music room and Buddy is telling her the story about high school, they are walking down a hallway, but when the view changes to the room with the bloody footprints they walk in from the lobby.
Visible crew/equipment: When the characters are spoofing "Charlie's Angels", you can see the studio roof in several shots.
Continuity mistake: Just before Buddy is thrown into the freezer he is thrown into a table. A white coloured box on the other side of the table falls off. In the next shot it is back on.
Continuity mistake: At the very end, when Cindy meets Hanson at the hot dog stand, look in the background. A guy with a yellow shirt and white trousers walks from right to left twice.
Visible crew/equipment: When Cindy is being chased by a skeleton, as it turns a corner you can see a skateboard device attached to the feet to help it move
Continuity mistake: The amount of potatoes varies on the butler's (Chris Elliot) hand from shot to shot during the dinner scene.
Continuity mistake: When they are being given out the goggles and guns, Brenda asks, "Do we have some walkie-talkies or something?" Then Dwight takes the cups out of the cupboard and suddenly they have been given out.
Continuity mistake: At the end of the movie, after the ghost is defeated, you see far away shots of Buddy, Brenda, and Kathleen Robertson's character standing together. From far away, Kathleen is on the end, and Buddy is in the middle. However, whenever the shot changes to a close-up of the three of them, Kathleen is now in the middle, and Buddy is on the end.
Continuity mistake: During the night, Ray is wearing a white singlet with a silver jersey over the top, Brenda is wearing a white tank top and Buddy is wearing a red T-shirt. When it cuts to the scene where Shorty is smoked by a giant majauana plant, Ray, Brenda and Buddy storm in with their casual clothing. Why would they need to change again?
Continuity mistake: When the main star gets locked in the freezer we see the temperature gauge go down to cold, but when we get an external shot of the door the gauge is at the top again.