When the runaway car is careening down the mountain, George is almost strangled by Blanche as she hangs on to his tie while flailing around in the back of the car. George's tie is clearly loose around his neck in several shots. When he crashes and climbs out of the car, the tie knot is perfect.
When Maloney and Adamson are in the back room of the jewelry store, Maloney takes all but two cigarettes from the cigarette bowl. However, minutes later, the bowl is full again.
The amount of beer in George's glass at the diner, while waiting for Maloney, increases after he takes a drink.
George removes the cap of the ketchup bottle twice between shots when he and Blanche are eating in Blanche's kitchen.
One of the FBI agents opens the door to the helicopter in a high shot and a man can be seen in the helicopter window (possibly a stunt double), however, in the next shot, it is a completely different man. The same error occurs when the helicopter is seen taking off.
The white mustang blocks exit from the garage at Devane and Black's house, but in a later scene, it is moved back to it only partly blocks the garage exit.
Obviously, Arthur and Fran moved the Mustang out of the way off-screen so they could drive their own vehicle out of the garage.
Obviously, Arthur and Fran moved the Mustang out of the way off-screen so they could drive their own vehicle out of the garage.
Poorly rendered rear screen projection is used for all interior car scenes, especially during the downhill runaway car sequence, where the actors' actions do not match the movement outside of the vehicle.
When Blanche is riding in the back of George's taxi, the use of rear projection is made obvious by the street lights ahead of the taxi moving back and forth through George's hat and head.
When Mrs. Maloney kicks the Shoebridge headstone in the cemetery, you can clearly see indentations from her shoe.