Continuity mistake: Dick Jones brags (admits?) to Robocop, "I had to kill Bob Morton because he made a mistake. Now, it's time to erase that mistake" while Robocop is crouched on the ground, not only looking away from him from across the room, but also Robocop's eyes are in a vertical position. In the playback, Jones is facing the camera as though it were videotaped or filmed in a studio. (01:10:50 - 01:35:10)
Continuity mistake: When Eliot Ness is at Jim Malone's house for the first time, Malone's collar is opened, then buttoned, then open again.
Revealing mistake: 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. After they land the cuffs are attached again. (00:31:00)
Factual error: 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. [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 Boesky 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].
Visible crew/equipment: When the trio are driving to the City Deposit/Federal Reserve Bank, in the shot just before hitting the white/red booth, the extended crane arm with the second camera and seated cameraman are visible behind the booth (for filming from opposite angle). (01:03:25)
Revealing mistake: 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. (01:04:15)
Continuity mistake: When Hi, Gale and Evelle are sitting in the trailer talking about robbing the bank, watch the newspaper on Hi's lap. It goes from being folded to being fully opened in his hands between shots.
Continuity mistake: In the car chase scene, the escaped convict and police are exchanging gun fire between cars. In the different shots of the police car, the bullet holes in the windshield appear and disappear several times. Also, when three shots have been fired at the police car there are four bullet holes in the windshield.
Revealing mistake: 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.
Other mistake: When Owen knocks the cup with soda out of his mother's hand, it hits the door, but no soda splashes on the door and the broken cup is dry.
Suggested correction: Liquid can be seen on the door.
Continuity mistake: When Kathleen goes to talk to Carl, her client, while he's in restraints she writes "You're deaf, aren't you!" on a legal pad then sits on his bed. She's holding her Sharpie in her hand, cap end up. When the perspective changes to Carl's, the Sharpie is cap end down. The shots go back and forth another time the same way.
Deliberate mistake: This has the old T.V. show style "it was 6 a.m. on January 7th we ... " beginnings to the scenes. Pay attention to those times and dates. They're not even close to being in sequence. I mean days, not just times.
Revealing mistake: When Sweet Chuck is sitting on a bench in the gym reading a paper, the big heavy comes down and sits next to him. Sweet Chuck goes flying up in the air a second before the big guy sits down.
Continuity mistake: When the four men are shot at the estate gate there's desk behind them with a hat lying on it. During the shooting the hat gets blown away, but in the next shot from the other side the hat is back in place. (02:00:50)
Continuity mistake: Theresa Russell makes the private investigator shoot an overdose of heroin. He rolls up the same sleeve in consecutive shots.
Continuity mistake: When Margaret is getting rid of the evidence of Billy Hahn visiting her, she crumples up the papers in his file and tosses them onto the file. The next shot showing her getting her gun out of the drawer, the paper is gone, then a different angle shows the large crumpled wad again, then again, a new angle shows an even bigger crumpled wad.
Revealing mistake: End of the movie big fight sequence between Madame Yeoung/Sue [Yukari Ôshima] and Angel 2 [Moon Lee] you can see the cable used to pull Madame Yeoung/Sue backwards after receiving a somersault kick to the chest.
Revealing mistake: At the end when Whoopi falls down the hill and hits her head on the rock, it's obvious that the rock is not real, since the rock moves very easily considering its size.
Continuity mistake: When he puts the pins in her eyes, evey time it is shown it's different - sometimes they are all covered in blood, sometimes only some of them or one, and sometimes there's no blood at all.
Revealing mistake: When the two Asian-American men are hanged upside down and shot on the tummy, they don't move, revealing they've been replaced by dummies. (00:03:20)