Visible crew/equipment: After Indy and Henry have escaped from Castle Brunwald, Indy jumps into one of the boats, pulls the motor starter cord and jumps back out, then just as he bends over to release the boat from the piling, right between Indy's legs the black covered arm of a hidden crewmember appears from under the tarp taking hold of the throttle, steering the boat away from the pier. (01:02:40)
Continuity mistake: When the Griswolds are driving to the tree farm, they are being harassed by the rednecks in the truck. Several shots of the front of the truck show only two passengers, but one view of the truck through its rear window shows three passengers. (00:04:17)
Revealing mistake: When the 54th Mass. marches past a liberated plantation some black children wave them on. One of them is wearing a digital wristwatch.
Visible crew/equipment: During Bud and Coffey's fight in the lab, we see a lightbulb swinging from side to side between the two men. If you look closely, you can see a hand (belonging to a third person) pushing the lightbulb. The only people in the room are Bud and Coffey. (01:44:16)
Continuity mistake: When Riggs jumps from Murtaugh's station wagon to catch up with the BMW on foot, he springs onto its rear window and asks the driver for proof of insurance. Interior brake lights are shining on his clothes before he falls to the pavement. Seconds later the driver stops to take a shot at Riggs, but now the BMW is missing the interior brake light altogether. (00:03:40)
Visible crew/equipment: After Bond received a lighter from Felix and Della, he uses it and the flame is big. In the beginning and the end, you can see a tube is connected to the lighter and the tube goes into his suit. (00:15:00)
Visible crew/equipment: Just after our two heroes have been fired from Big Edna's, a black Porsche crosses the screen treating us to a perfect reflection of the sound man, complete with boom and Sennheiser microphone. Really, it's that clear. (00:07:55)
Revealing mistake: When they gather around to watch what happens when you put the slime in the toaster, you can see when the toaster starts popping that it has little pneumatic pistons attached to the bottom, making it jump. When the toaster gets picked up off the table you can view its power cord which is entirely too big - more likely air lines. (00:41:15)
Continuity mistake: In the scene where the women are putting the eggs into the car and Ouiser walks over to Annelle and begins to converse with her, she is holding a carton of the eggs. The two front corners of the eggs keep changing colors as the shots keep changing from Ouiser and Annelle speaking.