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When Ness is "escorting" Nitti off the roof of the courthouse, watch the proximity of the two to the rooftop door. When the camera cuts from the edge of the roof to Nitti and Ness and then back to the edge of the roof, you can see that they went from close to the rooftop door to really far away from it.
In the opening scene, Gunnery Sgt. Hartman is making his speech and passes by Privates Cowboy and Joker on his way to the other side of the barracks. On his way he passes Private Pyle standing to the right of Private Joker. Later in the scene, when he rushes over to confront Private Joker and then moves on to Private Cowboy and then Private Pyle, Private Pyle is on the left of Private Joker.
Riggs handcuffs himself to the depressed businessman. They jump off the building but they're not handcuffed to each other anymore. They used plastic cuffs which could separate during the stunt in case anything went wrong. They break just as they jump, so they grab each other's hands to stay in contact.
There is a scene where the Chipmunks and Chipettes are singing the song "Girls of Rock and Roll." In that scene, it shows the boys walking up the stairs together and from left to right the order is: Simon, Alvin & Theodore. The shot goes to the girls then back to the guys. The order of the guys have swithed: (left to right) Theodore, Alvin & Simon.
The opening shot (of the New York Stock Exchange's trading floor) has the subtitle "1985," which might lead one to expect that at least the action in the first few scenes takes place in the year 1985. However, when Charlie Sheen is talking to his Nimrod broker buddy the Nimrod jokes that the day the Challenger exploded, Gekko was on the phone "selling NASA stock short." The Challenger exploded in January, 1986, not 1985. <em>[An explanation for this: Wall Street, as conceived and filmed, was supposed to be set in 1987. However, near the end of 1986, The Ivan Boaesky insider-trading scandal hit, many rules were changed, and acknowledging those events would have undone much of the plotting of the movie. So the movie was shifted back in time to 1985 (before the scandals, and also before the Challenger disaster), thus creating this major goof].</em>
Near the end of the movie, a DJ announces over the air that the crash had occurred that killed Buddy Holly, J.P. Richardson (commonly known as "The Big Bopper"), and Ritchie Valens. The DJ then plays the Santo & Johnny tune "Sleep Walk" as a tribute to the lost musicians. The crash occurred on Feb 2, 1959 (and one would assume the radio news announcement was within 24 hours of the crash). The song "Sleep Walk" was not released until July 1959.
After Mac has stabbed the scorpion that was on Dillon's back, he puts on a box and crushes it with his boot. You see a clear picture before he crushes it and then after he lifts his boot away. It is facing a completely different direction than before he stands on it.
The scene where Robocop and Lewis are at the steel mill after he was all shot up by ED-209 and the police, Robocop removes his helmet. Robocop all through the movie has a black lining on the sides of his face and chin. When he removes the helmet they just disappear.
When the "ghost" is first seen, it is mostly obscured by a curtain; only its right shoulder is visible. In the next shot, however, it is right in the middle of the window, and nearly the entire cutout is exposed.
The head of Mega-Maid mysteriously shrinks in size. After Spaceball-1 transforms into Mega-Maid, the head is gigantic enough for a Winnebago to fly through for a considerable length of time. However, later on in the film, after the head has been jettisoned and crashed on a beach, the head is only big enough to hold a few dozen people. This can be determined by the size of the people coming out of her nose.
When Monty drives Withnail & I into Penrith the radish is on his left lapel. When they arrive in Penrith a few minutes later, the radish has mysteriously moved to his right lapel.
Near the end of the movie, right before the semi-finals, they say that only eight men are left. When they introduce the men, they only call out six names.
When Michael J. Fox is in the pool with Auntie Vera, she pulls off his shorts, however you can clearly see the flesh-coloured pants he has on underneath.
When the Empress Dowager dies, she can't stand opening her eyes and closes them as the servant covers her face. You can see that through the white cloth.
In the scene where Ronnie Cox's character gets shot when helping to fix Brigitte Nielson's car, the gun is fired twice, yet there are 3 bullet holes in the rear windshield. How did that happen?
When the guy falls off the cliff and splats on the rocks below, if you watch it in slow motion, you can just see an orange bucket appear for a few moments which chucks the blood in the air.
When John Candy is singing "The Mess Around" in the car, the car swerves, and a hubcap from the passenger side rolls off. The hubcap is back on in the next scene.
When Ash is crawling through the cellar, he finds some of the pages, and he holds them in his right hand. Only problem is, he cut off his right hand earlier and attached the chainsaw to it - the film was flipped so he'd appear to be crawling in the right direction.
In the scene where the 3 women are being pursued in the mansion by a morphing Jack Nicholson, Susan Sarandon falls over a balcony and is about to hit the marble floor below. Cher and Michelle Pfeiffer begin to laugh and urges Susan to laugh also as doing this causes them to float. Susan begins a nervous laugh and just before she might hit the floor she begins to float above it. Right here you can clearly see the two wires that are holding her up.
In one of the scenes where Arnold is running through piles of debris an explosion behind him causes him to fly through the air. The mechanism that launches him in the air can clearly be seen flipped up from the ground.
When Superman and the super villain are fighting on the moon, when Superman flies in and lands at the beginning of the fight, you can see the cables that are suspending him.
When Sam goes into "The Sinker" bar, he goes over and talks to Stacy at the table. When he slips Stacy a photo of the Cherry 2000, between a wideshot and closeup the glasses on the table around Stacy change, as he looks at the photo.
When Jack is hanging out of the truck you can see him standing on the hood of the car which Lydia is driving. At some points we get camera view from the back seat of the car. In some angles the mirror inside the car disappear. This is to prevent us from seeing the camera.
When Joe (The American Ninja) pushes the girl out of the moving truck, one sees the stuntMAN (playing a girl) mis-time the fall and land on a large clump of rock and dirt, after which, before the scene cuts, we see the stuntman curl over in pain. Obviously a very painful fall for the stuntman and a very very funny scene for the viewers.
When Julian uses a credit card to open the sliding glass door at his parents' home it's obvious that there is no latch or lock where he inserted the card when the door opens.
The boom mic is visible when Sally sings her "Pie in the Sky" song and when Courtney and Sally are standing in the bathroom, before Sally's face explodes.
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