Bad Day at Black Rock (1955)

Continuity mistake: During the desert chase sequence, when our hero is run off the road by Ernest B. his missing arm is momentarily transposed when he steps from the jeep.

Revealing mistake: Whilst Spencer Tracy is driving the Jeep through the desert at high speed, during one of the long shots the rough terrain causes the vehicle to bounce violently; if you look carefully you can just make out the stunt-driver's "missing" arm coming out from beneath his jacket to help wrestle with the steering wheel.

Other mistake: In one scene a station wagon pulls up with a 300 to 400 pound dead deer draped over the hood. Later, as the shot changes, one of the hunters can be seen in the background easily carrying the obviously fake deer.