Other mistake: In the warehouse scene when they're standing around the crate containing the heavily magnetized alien, all metal objects like guns and other items are pulled towards the magnetic force field. But Indy, who is standing next to the crate, has a bag with a metal strap that stays still when it also should've been pulled towards the alien.
Factual error: In the warehouse when Indy and the Soviets open the crate with the alien's body, all the overhead lights are pulled towards it. If the magnetic field was that strong, the lights also would have been pulled towards the box before it was opened. (Put a toy car on top of a table and pull it with a magnet from under the table to see the field in action).Rlvlk
Other mistake: When Indy escapes on the rocket powered train, it is slowed down by a pool of water on the tracks. The only problem is that when this happens in real life, it's almost the same as slamming into a wall, and therefore Indy should have been flying several feet away from the rocket powered train. You can actually see the chair that the test persons before him used, and it has double seat belts on it.
Continuity mistake: In the beginning when the Russians are talking to Indy, his shirt is tucked, then in another shot it's untucked, then it's tucked again. This continues for about 3-5 shots.
Continuity mistake: Right at the start when the Russians pull Mac out of the car, they throw Indy's hat on the ground and there is a close-up shot of it where you can see Mac's feet right next to it. It then cuts to a relatively wide bird's-eye shot over the car as it is surrounded by Russian soldiers and there is nobody near the hat - Mac isn't even in the shot.
Revealing mistake: Right after the nuclear explosion and Indy comes out of the refrigerator, the scene changes to an airfield with two cars driving across the screen. The cars are obviously CGI, as the first one turns despite the wheels still pointing straight.
Continuity mistake: Mutt points out at Orellana's mummy, whose shroud is tightened and neatly set. Indy walks towards it and the shot cuts to a closer angle where the shroud is now crappily set. Obviously there were previous shots of Indy opening it, and the shroud was later messily closed to repeat the shots.Sacha
Continuity mistake: When Indiana and Mutt are in the diner, notice the coffee cup Indy has on the table. In one shot, he has it in his hand. In another, his hand is not on it. This happens twice with the different camera angles.
Factual error: At the beginning of the movie where the convoy stops at the gate to the military base, the fence has "Razor Wire" on the top, not the period-correct barbed wire. Razor wire came into use in the late sixties by some industries, but the military did not use it until the eighties.
Continuity mistake: During the chase above the waterfall, the assault boat has its machine gun snapped off. When the assault boat goes over the waterfall the gun is visible again for a few seconds. The gun is gone when they get to the bottom.