Revealing mistake: When the stripper appears from the changing room during the cabaret scene, the stripper music is heard, but if you look carefully the tape recorder which is supposed to be playing the music is not actually moving.
Revealing mistake: When the bridge is exploding from the mine attack, the stuntman playing Jason obviously launches himself out of the captain's chair.
Revealing mistake: When a baddie in a red jacket repeatedly punches Hightower, who's in the water, the fist always stops about 15 cm from his face.
Revealing mistake: When Hightower is in the Monster Truck you can see that a white stuntman is actually driving it in one of the shots.
Revealing mistake: Just before Marguerite tastes the chocolate Henry gives her, in the shot of the group walking past a pen of geese, the modern, flat, white soled shoes (likely canvas sneakers) the sisters are wearing are visible as they walk. (00:51:00)
Revealing mistake: When the cook's body is lowered to the kitchen floor, you can see her move her outstretched arm closer to her head.
Revealing mistake: Brad Pitt's tattoos appear to smudge during the last fight.
Revealing mistake: In the scene where Calvin is driving with Ricky after bailing him out of jail and Ricky tells Calvin to pull over so he can toss the gun, you can clearly see that Calvin isn't actually turning the steering wheel. You can notice this more after Ricky gets back in the car and Calvin drives away and does a hand-over-hand turn.
Revealing mistake: When Shelly and the girls (the playboy mansion girls) are getting their hair done for her birthday, the stylist is curling Shelly's hair but you see the iron doesn't touch her hair at all. (00:03:50)
Revealing mistake: When Forrest finally catches shrimp on the boat, the net drops shrimp on the deck which are not only already dead, they're headless and very obviously processed for shipment to market. (01:32:30)
Revealing mistake: In the part it shows Ash getting sucked into the time portal you can see the wire he is hanging from. (00:02:45)
Revealing mistake: Near the start of the film, when Lt. Harley is watching his love interest show off by doing gymnastics on the tree limbs, several times you can see the actual pole she is swinging on, not the tree limb. (00:08:50)
Revealing mistake: When the lawn mower the heroes send off as a diversion crashes you can see a wire pulling it. (01:01:30)
Revealing mistake: Underdog's first costume is supposed to be a felted down (the more accurate term would be fulled) wool sweater. When wool is felted the stitches lose clear definition and usually achieve a "felted" look. It is clear that the sweater in the movie has just been switched for another smaller sweater as the stitches are still sharply defined after it has been pulled from the dryer. This is especially clear around the U. No attempt to make the smaller sweater look "felted" was made. This refers to the original costume with the solid white U, not the second costume with the yellow outlined U.
Revealing mistake: When Stan falls into the dug-out at the baseball game you can clearly see the crash mat that he lands on.
Revealing mistake: The paving slab Broomhilda falls onto and supposedly breaks is already broken.
Revealing mistake: When Macaulay Caulkin has all his friends over and they are riding the rollercoaster there is a section of it missing.
Suggested correction: The "missing" track is the car loading track for the station.
Revealing mistake: After Clark cuts the rope on the large tree, it spreads out and branches start breaking windows. One of the branches has a pole of some type pushing it through the window.
Revealing mistake: When Inspector Lee was running through the casino, his hands are bound together with tape. When he tumbles across a gambling table, his hands come apart. When he completes the tumble, he quickly puts his hands together again. (01:09:00 - 01:10:15)
Revealing mistake: In the David Letterman scenes, Paul Schaeffer's head is shaved, which he just did recently (maybe within the last year to year and a half). (01:15:00)