Continuity mistake: Towards the end, Danny Aiello fires at James Spader, and we see a brief close-up of the door frame being hit - there are two bullet holes seen in the door - one above and just to the left of the other. Then we cut away, and when we cut back and see James Spader looking around the door frame, there's just one bullet hole.
Continuity mistake: When the former owner of the studio is asking for money, the boom mic is clearly visible throughout the entire scene above the heads of the two actors.
Continuity mistake: Throughout the scene where Jamie and Howard are in Jamie's room, as Jamie is drawing, keep an eye on his picture. It is inconsistent between shots.
Continuity mistake: Right after Clooney picks the kids up from pre-school. It was superhero day, so the kids are dressed in homemade costumes. If you watch the little girl, she changes back and forth between superhero and little girl within the blink of an eye.
Continuity mistake: When they are attempting to get "between the screws" of the tanker, the underwater footage shows twin screws, but the surface footage only shows wake from 1 single mid-ship propeller.
Continuity mistake: In the scene when Jerry arrives at the top star's house to make sure he's still staying with him, he arrives in an Eagle Vision car, but later leaves in a Pontiac Grand Prix.
Continuity mistake: When Renton goes home with Diane, after they finish having sex, she tells him to get out and leave the room. As Renton sits up, it's very obvious that he's not wearing any protection. Not thirty seconds later, he peels off his condom in the hallway.
Continuity mistake: During the press conference at the U.S. Open where Roy begins to list the companies who are sponsoring him, he says that one of them is "Woody's Smokehouse" when the patch on his jacket says "Wally's Smokehouse".
Continuity mistake: Shortly after Jasper & Horace steal the puppies, a blue Renault 4 is seen going past the entrance to the mews. About 3 seconds later it goes past again in the same direction.
Continuity mistake: In the scene where the Graboid is pulling the truck you can see that there is a gun rack and a gun in it. Right before they are about to hit the rock you can see that the gun falls off of the gun rack. The gun goes on and off the rack between the following shots. (00:30:25)
Continuity mistake: In the scene where Elle walks in to Joe's gallery, the camera takes a shot of her body from the bottom up. At this point she has on black high heel sandals. In the following scene, you see Elle in the background with brown, flat, daggy slippers.
Continuity mistake: When the press secretary kisses the hand of the alien-dressed-as-a-seductive-woman, the eyeball ring is on her right middle finger but after she knocks him out (or kills him) the ring is on the finger between the middle and the pinkie. In subsequent scenes it's back on the middle finger. (01:01:35 - 01:04:20)
Continuity mistake: When Mrs. Waterhouse walks into the livingroom and greets her three babies, there is a large area rug in front of the coffee table. However, as the babies fly towards her in the wide shot facing her, that area rug is gone! (00:22:55 - 00:23:50)
Continuity mistake: When the Presidents jump off the moving train, James Garner pushes Jack Lemmon off first, waits several seconds, then jumps himself. Given the speed and direction the train was going, Garner should have landed quite a ways away, to the left of Lemmon. But he ends up only a short distance away, to the right of Lemmon (based on the direction they were facing when they jumped.)
Continuity mistake: All throughout the movie the back projection does not match the locations they are at.
Continuity mistake: Near the beginning, when Val tells Armand he is going to get married, Armand drinks his whole glass of white wine. But in the very next shot where Armand stands to get another glass of wine, you see that the glass is almost half full.
Continuity mistake: When Rose suggests to Greg that they could have sex tonight he is so shocked that he spits his coffee across the breakfast table, but if you look closely it's only water. (01:14:10)
Continuity mistake: When the first FBI agent gets thrown from the passenger side of the car the scene is of a city street. When the second agent gets thrown from the car just seconds later after he hits the road the scene to the left looks grassy instead of city.
Continuity mistake: When Demi Moore just finishes her dance for Congressman Dilbeck, he helps her put on her blouse. When he puts it on, her hair is underneath the blouse, then a little bit later, you look again and her hair is above the blouse. (01:19:07)
Continuity mistake: In the early scene at the diner, after Paul sits down at the table, his insulated mug changes from in his hands to at his sides and turns itself after he leaves. (00:06:50)