Revealing mistake: Eddy Albert's stunt double is obvious during the avalanche of boulders scene.
Continuity mistake: Andy's car crashes into a boulder in the beginning and stalls. But when he gets the engine started and drives away at the end, there's no damage at all to the front end of the car. (00:49:30)
Visible crew/equipment: A glass shield used to protect the camera from a styrofoam rock slide shows us the ghostly reflections of several film crew members, including one wearing an enormous "10-gallon" cowboy hat. (00:31:30)