Continuity mistake: When Karen Black shoots the sheriff, she puts the gun up close to the side of his head and fires. We see blood shoot out of the opposite side of his head but the side she shoots him on has not a scratch.
Continuity mistake: When Wick and Stucky are arguing near the bathroom, the gun that Wick is holding changes from a silver revolver to a black one and then back and forth several times. Right before Ravelli busts in, you can see a clear shot of the gun, and it is black instead of the silver it began as.
Continuity mistake: The car belonging to the kids gets its windshield completely bashed in with seven blows (to the point where it partly collapses into the car) by Otis. When the car is later found and examined by the police, the windshield, save from a slight bit of damage in the center, is almost completely intact. (00:40:00 - 00:53:00)
Continuity mistake: When the father and deputy look around the house and find the room where one of the girls is chained up, they start to use a wooden stake to open the chain. The scene changes to the sheriff in the house and the Slim Whitman songs begins and we see the wooden stake has been replaced by a metal rod resembling a fireplace poker.
Factual error: The movie takes place in the 70's, but Sheriff Wydell's truck is a 1981 or newer. The front grill was used from 1981 to mid 80's.
Continuity mistake: In Bill's torture scene, the design on his sweater changes.
Revealing mistake: When Otis cuts off Bill's hand, you can see it's a fake hand because it turns sideways after the first swing of the axe.
Continuity mistake: During the robbery in the beginning, the guy that is pulled out of the bathroom is holding a binder and the key attached to a big hand to a ring on the middle finger. Between shots the hand changes gestures and the way he's holding it switches back and forth.
Chosen answer: Dr. Satan wasn't in their basement. As you watch the movie, they walked quite a ways to this well structure where they put two of the captives in this box and lowered them down. It was quite a way from their house. When the girl comes up from the dirt, there house is nowhere in sight.
Jonathan Thompson