Revealing mistake: As Kevin is flying off the front porch on the toboggan, you can see the small wheels mounted on the bottom of the sled to aid in its "jump". (00:25:30)
Revealing mistake: In the scene where Lorraine Bracco points a revolver at Ray Liotta's head, after Ray Liotta turns the tables and now points the gun at Lorraine Bracco as he gets up and walks away you can see Ray Liotta steps on Lorraine Bracco's hand and she opens her mouth wide like shes screaming but it must have been cut from the audio, as Ray walks off camera his expression changes to show that he knew he had accidentally stepped on his co-workers hand.
Revealing mistake: Just before RoboCop gets out of the car to walk towards the baseball coach, Lewis shoots at the coach and he jumps back. Watch carefully. Whilst jumping, his hat comes off slightly and you can see the make-up for the hole in his head, which he doesn't receive for a few seconds after this. Seen best in Slow motion on the DVD. (00:50:31)
Revealing mistake: In the scene where Kim comes home early from the camping trip, Edward is startled and begins stabbing the water bed, thus causing it to spring many leaks. If you actually look at the bed, it isn't jiggling like a water bed should and the water is just spraying out even in places he isn't stabbing.
Revealing mistake: On the toxic plant, where James runs from the forklift coming out of the garage door, the oil drum containing Carl flips off the forklift. When the oil drum flips, you can easily see the mechanism used for flipping it. (01:17:45)
Revealing mistake: Vinnie places two coin-filled water bottles in the trunk of his car and closes the trunk. As he is walking around the car to get in, the back of the car suddenly sinks down, which by itself indicates a special effect, as springs don't behave that way. But in addition, the rear tires, which would appear flattened if under a heavy load, are completely unaffected by all that "weight."
Revealing mistake: There are a couple times you can see the tape that marks where the actors are supposed to stand in the shot. In the beginning, when Bobby and his brother walk in on Ernest trying to get a cleaning machine to work, look on the floor and you will see some tape in the shape of a T. Bobby will move his feet to the T. Also when a criminal begs for Nash's help because he killed someone, and Nash walks forward, look on the floor to see another tape T, and what do ya know, Nash stops right on the T.
Revealing mistake: Near the beginning of the film, when Charlie and Brian steal the Honda there is a shot where Brian says "Charlie, slow down, think". By comparing the view outside of the car window in this shot to the surroundings of the previous and subsequent shots, we can see that it was filmed out of sequence, and in a different part of the parking lot.
Revealing mistake: When officer Van is shot with a shotgun there is one shot in which he flies backwards towards the camera in slow motion. From this point of view the launchpad (catapult), from which the officer is thrown, is visible underneath his feet.
Revealing mistake: When "Krebbs" the koala is discussing with his other friends in the cell. If you look closely, you can notice a blink in the outline in the "Krebbs" nose. It's a clear ink & paint mistake of the blur line.
Revealing mistake: Outside the courthouse, there is a sudden downpour and the rain is coming almost straight down. Cut to a close-up of Van Damme and the rain is suddenly heavier, coming in at much more of an angle, and it's noticeable that Van Damme is not even getting wet. Cut back to the scene where Amanda is walking away, the rain is now back to being more vertical, is lighter and this shot shows that Van Damme's hair has not been touched by a single drop of rain.