Revealing mistake: When Robert and Julie are attacked by snakes outside the cave, notice that in the shots when you see the backs of Robert and Julie there are hardly any snakes on the ground (I counted one) compared to other shots. The shots of Robert's leg as he sweeps the snakes away are almost certainly of a snake handler instead of the actor. (00:37:45)
Revealing mistake: When Donovan finds Diana's abandoned car in the desert, the outside shots of the chopper reveal that it is not Marc Singer at the controls. (00:36:40)
