Revealing mistake: In the soda shop, the waitress turns off the lights with her elbow because her hands are full, but she misses the light switch by 6 inches. (00:55:10)
Revealing mistake: In several scenes Superman has fillings in his teeth.
Revealing mistake: When Bluto is watching the sorority girls have their pillow fight and he falls down with the ladder, you can see him land on a grass mat that is cut into the lawn. It's funny because you can see the grass push in. (00:40:00)
Revealing mistake: When Cheech and Chong are parked in their car smoking a joint, the car is filled with smoke. The smoke must come from a smoke machine outside as it is moving around very fast as if blown by the wind. (00:13:25)
Revealing mistake: When the police officer falls down at the lake and lands face to face with the rattle snake, you can see the glass separating the actor and snake.
Revealing mistake: When Emmannuelle and the footballer are kissing at the football ground, it's obviously supposed to be in the medic's room - you can see a couch and a set of drawers and a filing cabinet and a medics bag with bandages and things - and yet the room also has five shower heads and wall mounted soap dishes. It's really the showers. (01:04:30)
Revealing mistake: In the scene where Cully injects Sonny in his back, you can see that just just after he pushes the plunger, the spring mechanism moves on the inside of the syringe. He is not actually injecting Sonny, but the needle retracts on a spring loaded mechanism into the syringe. (00:14:40)
Revealing mistake: While Billy and Eli are on the river, with Eli in the front and Billy in the background, pay attention to Eli's paddle. When it passes in front of Billy, you can see right through it to see Billy through the paddle. (00:56:25)
Revealing mistake: When Gilligan is being pulled around in the water after getting on the hut boat, you can see the superstructure of the walls around the lagoon.
Revealing mistake: In the opening scene, the tomato in the sink starts moving and as it comes up toward the rim, you can see a person's finger as they toss the tomato in, revealing the whole thing is run in reverse.
Revealing mistake: When Jake reactivates the old biplane at Daley's Airport and Wilson mounts it as it takes off to pursue Olympus, you can see the wires from which the skeletal plane is hanging. (01:29:20)
Revealing mistake: The car has side-exit exhaust, or 'side pipes' as they are more commonly called. The characters also refer to them as 'Mercury tubes' several times throughout the movie. In the scene during the car chase out of Las Vegas, the Vette skids to a stop at the freeway dead-end sign. As the car accelerates away again, the actual functioning stock exhaust pipes can be seen exiting under the rear bumper and smoke can be seen coming out of them. The 'Mercury Tubes' aren't even hooked up.
Revealing mistake: After the trailer explodes on the bridge, towards the end the truck swerves to the left. As it drives off the bridge there is no tail shaft between the gearbox and front diff - the truck falling off the bridge is just a shell.
Revealing mistake: When Cato is riding the motor scooter he has taken from the ice cream seller down the cobbled street, four men jump out of his way. This shot is used twice; first as a close up then as a long shot.
Revealing mistake: Lou received Georgia's rather incriminating phone call. Only his bedside lamp is lit, supposedly, but when he opens the drawer of the nightstand the lamp is on, it casts a light on the wall above, revealing the presence of more sources of lights in the room. (00:07:00)
Revealing mistake: At the beginning when the teens break into the waste water plant and start swimming, the boy gets attacked then killed by the unseen piranha, and a large blood pool spills out into the water. The girl is but 3 feet away, but somehow doesn't' see the blood as she calls out his name and scolds him for not responding.
Revealing mistake: During the final chase between the son of the Sheik and the evil oil company henchman, Tomas Milian is replaced on the speedboat by a stuntman wearing a bad wig in some shots, and in other shots by the cutest little puppet that rides the cutest little toy boat. (01:23:00)