Other mistake: In the beginning of the scene where Gage is killed by the Orinco truck, the truck leaves the plant. The number on the trailer is marked T-80. In the scene, the truck rolls over in the accident. In later scenes where Rachel hitches a ride home with another Orinco truck, the number on the trailer is also marked T-80.
Pet Sematary (1989)
1 other mistake
Directed by: Mary Lambert
Starring: Dale Midkiff, Denise Crosby, Fred Gwynne, Brad Greenquist
Revealing mistake: When Louis goes to give Gage the shot, if you look closely, you can see that the needle is just a fake prop and doesn't leave a puncture mark.
Jud Crandall: How's your cat, Louis?
Louis Creed: It's Ellie's cat.
Jud Crandall: No. It's your cat now.
Answer: Because in the book, the sign at the entrance to the "Pet Semetary" was written by some anonymous child. Clearly he/she couldn't spell that well yet.
Grumpy Scot