Goofs

In the opening scene, a knife sticks in the wall by the victim's head. In most subsequent close-ups, the knife is not there.

In the scene where Mr. Slausen leaves Molly with the rifle in the truck, you can see a short male mannequin standing behind her in a sort of saloon setting. Thereafter any time you see her from the same shot, he's no longer there.

Jerry's mummified mannequin corpse was taken apart by Mr. Slausen, with the head shattered into pieces. However, when Molly is driving down the road with the mannequin versions of her friends in the back in the ending, Jerry is suddenly back together.

When Woody jumps through the window, glass is scattered all over as expected. When Becky climbs out barefoot, some of the glass has been swept away for her to escape.

When the girl throws a snake in the stream, she throws it close to the little wooden bridge, but in the next shot snake is shown swimming to the said bridge from a position farther from where she was thrown at.

String is plainly visible when the flying pipe impales Woody, and when the scarf starts to strangle Eileen.

In the credits, Mr. Slausen is spelled differently than on all of the signs in the movie with his name.