Revealing mistake: Having been deserted by their porters three white people and a native journey on. During their journey an antelope is shot by Allan Quartermain for food. The sound of the shot is dubbed in as there is no recoil from the high powered rifle he uses.
Revealing mistake: The crew of spaceship Luna make an EVA to dislodge a stuck radar antenna on the ship's hull. One astronaut pokes a tool into a cavity to dig out an interfering mass of machine grease. As he digs, the material comes out of the hole and rolls down the side of the skin of the rocket under its own weight, rather than floating off weightlessly into space.
Revealing mistake: When Melissa Duck runs down the aisle with the Scarlet Pumpernickel at the church, you can see that the other wedding guests in the background have no faces on them.