Visible crew/equipment: In the scene where Gus, Drew and Jeff are sitting at the dinner table, when Gus drops the beans they show a close up of him. In that shot look in the background and you can see a spotlight.
Pet Sematary II (1992)
1 visible crew/equipment mistake - chronological order
Directed by: Mary Lambert
Starring: Clancy Brown, Anthony Edwards, Edward Furlong, Jared Rushton
Revealing mistake: When the kids are burying Gus, his supposedly dead face flinches when they shovel dirt on him.
Gus Gilbert: You bury your own.
Trivia: Towards the beginning of the movie when Drew is told to take Zowie the dog outside of Gus' house, there is a cross (crucifix) hanging on the wall to the right of the front door. Towards the end of the movie when the Vet comes to Gus' house, is attacked by Zowie, he enters Gus' house. Notice the cross is now hanging upside down, I'm sure to indicate evil is now resident there (although Gus was pretty much an evil bastard even when he was alive).