Revealing mistake: In the scene where Axel throws the art dealer's henchman onto the buffet table, if you watch carefully (or use slow-mo) you can see the stunt double pulling off that manoeuvre. There is also a stunt double being thrown over the table.
Revealing mistake: Watch very closely when the horse is waking up Atreyu. It seems to be searching for something behind Atreyu and then you see a sugar cube fall out from behind him.
Revealing mistake: When Carolyn and the Geek are in the parking lot across from her church, Carolyn gets some help as she climbs over the side and out of the Rolls-Royce - as opposed to using the door. As she makes her way over the side, you can see that she steps onto a step-stool or similar above-ground block before stepping down once more with her next step onto the pavement. There is no such step on the car itself.
Revealing mistake: When Col. Tanner is on top of the Russian tank, he is firing his pistol into it. After a few shots, you can see that the slide on his gun locks back, showing that the gun is empty. Tanner does not reload, but is none the less able to keep shooting afterwards. (01:11:25)
Revealing mistake: When the sheriff is going to whip Sarah, he tells her to take down her drawers. Bad editing, you see her hand reach back and make the motion as if she is pulling down her panties but it is visible they are still up.
Revealing mistake: Going to his father's old place, David and Allison turn right on the corner, pass some stores and then turn left to drive into the lot of the Texaco station. The reflection shown in the stores' windows across the street is not at all what is supposedly across from those stores. Also, when they start to pull away from the station a set of studio lights are reflected in the side back window of the car. (01:02:40)
Revealing mistake: When the village where Pran is hiding as a servant is bombed, you see a lot of stuntmen performing elegant jumps as if they were doing gymnastics, some long after the impact of the bomb would have hit them. (01:56:50)
Revealing mistake: In the scene when Turbo is sweeping in front of the grocery store, he begins dancing with a broom and you can see the wires that are holding the broom up, making it seem like the broom is floating.
Revealing mistake: When a man is shot in the head, the bullet hits his hat, and it's very obvious there's no real bullet wound, his hat just opens and reveals a red hat he's wearing.
Revealing mistake: When Bob Cratchit takes Tiny Tim by the town square to watch the boys play, you see many boys "sliding" on the ice. In the close-ups of the boys you can see the "ice" ripple beneath their feet, revealing it to be some sort of plastic.
Revealing mistake: When Ariel is playing chicken with the oncoming truck, as she is standing on both cars, notice that her hair is dark brown to black in colour, then it's blonde again. The hair colour changes a few times. It's obviously a stunt woman.
Revealing mistake: When Tom tries to fix the dam during the rainstorm his face is suddenly dry in the two shots before the track of his bulldozer snaps. (00:06:25)
Revealing mistake: The ammo box that is removed from the purse is for blank studio type cartridges, and not ballistic ammunition.
Revealing mistake: At the beginning when the one monkey falls to its death, it's obviously a stuffed animal posed as a dead monkey.
Revealing mistake: Near the end, Clint Eastwood picks up a lamp in anger and throws it across the room, but there's no power cord attached to the lamp.
Revealing mistake: When Jake is driving his car to run down Vince, there is a quick shot just before he hits him that is obviously a dummy placed in front of the car.