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In the scene before they jump the gap, they played the film in fast forward to make the bus appear to be going faster. If you watch the police on the truck in the background, they are moving in fast forward as well.
When the warden comes into the cell the morning after the escape, the poster covering the hole is fastened down on all four corners - impossible to do after squeezing into that small hole. <em>[On the DVD commentary, the director confirms that this was a movie "cheat".]</em>
When they are giving Mia Wallace the adrenaline shot, they mark her chest with a red magic marker. When the shot has been given, the red mark has disappeared.
At the beginning when Alfalfa is in the boat and the girl slicks his hair back, there is a shot where Alfalfa's hair is already up. When she kisses him, his hair pops up again.
Throughout the movie, in the shots of the guys on the alien planet, the white reflector screens and film crew's reflections are visible in their sunglasses.
In the opening scene when Andy Garcia is talking to Meg Ryan in the bar, the level of the beer in Meg's glass on the bar changes depending on the camera angle.
When Helen Tasker pretends to be the hooker, Doris, at the hotel room, she does a striptease and you can see a burn scar on her right hip from a childhood accident. Then it is gone during closeups, as a body double is used.
In the movie Christie Swanson drives a BMW 3 series coupe. In the scene where they were making love the car suddenly changes to a four door model then back to a two door.
When the evil king's female assistant is "turned into" Odette, and Prince Derek is dancing with her near the end, he puts the locket on her. The chain goes around her hair, and in the next shot, it's under her hair. They were dancing the whole time, so how could she or Derek have pulled her hair out of the chain?
At the wrap party for "Bride of the Atom," when Dolores starts screaming at Ed "These movies are TERRIBLE!" her hair is curled in ringlets that hang down to the tops of her shoulders. She then stalks out of the warehouse, and Ed follows her. When he catches up to her in the parking lot, and she tells him she is leaving him, you can clearly see that her hair is suddenly much shorter and curlier.
In one scene of the movie, after Brendan Fraser and Joe Pesci have been sitting on the bridge, Fraser's cast is on one leg. Two seconds later, the cast has switched legs.
When Guy and Dawn are in his apartment and Guy is called into the office, he puts his jacket on. His collar goes from being turned up in the back to folded down from shot to shot.
There is a theater showing 'La Dolce Vita.' That movie came out in 1960, but this film takes place in 1957 or 58 (since there is a reference to new 1958 model car).
In the first scene when the girl is walking down the sidewalk she passes by a female zombie wearing a brown shirt twice, and she passes by a male zombie in a blue and white shirt, and a few seconds later he's with a group of zombies that carjacks her in the woods outside of town.
When Francesco and 'she' are in the cemetery together and the little blue flame-beings gather around to watch them, you can see the wires they're suspended on several times. This is most apparent when Francesco sees the first one (moments before seeing 'she' at the fountain) and also just before they are all frightened away.
At the end of the movie when the mob guys come to the boat house to move the body, Barry the Blade shoots a raccoon with his gun which has a silencer. But, later when Reggie shoots the neighbor's alarm system with Barry's gun, it does not sound like it has a silencer anymore.
In the sequence in which Marisa Tomei and Bonnie Hunt are getting ready to meet Damon Bradley, Marisa is sitting in front of the mirror fixing her makeup, then Bonnie looks in the mirror and is putting on her right earring, then in the next shot, she is grabbing the earring from the bureau and putting it on again in the right ear.
In the film Jeff Douglas is out to kill the five leading kingpins of "the Hand". After he gets the first three, he goes after the last two who are hiding together. But the two fall out and one (Manter) shoots the other one (Kowalski) dead. Later, when he catches up with Manter, he doesn't kill him but lets him live to face justice (though he does die at the end). After catching Manter, he acts like it is the end of his "quest", yet does not know that Kowalski is already dead, and therefore should be out looking for him, not stopping at Manter's capture.
In the scene where Jack Scagnetti is torturing Mallory Knox in the holding cell she has bare feet. When Mickey comes to the rescue her shoes have suddenly appeared on her feet even though she never had time to put them on.
When Wyatt (Kevin Costner) becomes the sheriff/deputy/policeman of Wichita, Kansas, you can plainly see mountains in the background - there aren't any around there.
In the very first scene where Old Tony is debriefing Leon, we see Leon pick up his glass of milk and drink the entire glass. However, if you look at the reflection of Leon's glasses as he takes the glass away from his mouth, you can see that the milk is not finished.