Continuity mistake: During the scene where Dwight is handing out the goggles, and right before the part where Brenda asks about the walkie-talkies, if you look behind Dwight, you will see that there is one more pair of goggles in the cabinet. After Brenda asks the question, the cabinet is empty.
Continuity mistake: At the end of the film, when Dwight gets pulled into the room and sits down in a chair beside Ray and Buddy, Ray's shirt is orange. Then when Dwight says, "I can't feel my legs," it cuts back, but Ray's shirt is yellow. It alternates throughout this scene between orange and yellow.
Continuity mistake: When Dwight is handing everybody goggles, cup walkie talkies etc., the red numbers on the machine nearby keep changing in most shots. You can clearly see "02.38.58" and it is counting down. Then in the next shot it is "02.39.48" and is counting up. Then it is "02.17.00" etc.
Continuity mistake: In the scene after the main female characters portray Charlie's Angels, they go back to where the guy in the wheelchair has set up a pad that Cindy has to lure the ghost into, from one shot to the next (when Cindy goes to lure the ghost) Cindy's lipstick colour changes instantly from red to beige although her clothes stay the same.
Continuity mistake: In the opening scene when the priest is playing the piano, in close shots of him you can see the back of the musical sheets sitting on the piano, and they are just pages of musical notes. Yet between two shots a book which says "Eckstein" appears. Then in the next close shot the "Eckstein" booklet isn't there and just musical sheets are visible.
Continuity mistake: When Cindy and Buddy are in the cool room and she is talking on the cups, you can see what appears to be blood on the bottom of her pants. In a scene cut from the film (it's on the DVD), Cindy covers the floor in blood before they get pushed into the cool room (spoofing Hollow Man). Since scene wasn't in the film, she shouldn't have the blood on the bottom of her pants.