In the flashback of Ben and Laura Mae hitchhiking along the lonely road in New Mexico miles from town, Cole Clinton drives up in his Imperial convertible and offers them a ride. The convertible has a rear view mirror clearly showing attached to the front windshield in the camera's wide shot point of view. In the next closeup scene with the point of view from the front of the car and the windshield centered in the frame, the rear view mirror is missing. In the next scene, a wide shot of the car driving into the hotel parking lot, the rear view mirror is mysteriously re-attached back onto the windshield.
When Richard Chamberlain goes to Clinton's house and the butler opens the door and says, "Good evening Mr. Mitchell," he closes the door and the reflection of a crew member holding a light can be seen in the glass of the door.