Revealing mistake: During the beginning, as the newspaper headlines roll, the small text in the articles is actually the same text repeating itself over and over again, something like: "an investigation issued."
Revealing mistake: When Charlie is writing her letter we can see it through a hidden camera in the pen she is using. By watching the angle on how the camera would be attached to the pen we know that she would have seen the camera. Also her hand would be blocking the camera view, so we shouldn't be able to see anything at all. (00:30:30)
Revealing mistake: When Brad Renfro is standing outside Reggie Love's house, hitch-hiking, he is laughing so hard he has to turn away from the camera, and even then he is still visibly shaking with laughter.
Revealing mistake: When Marnie is dreaming, watch her window. The curtains move as if there is wind, but the window is closed.
Revealing mistake: When Carol Anne has been hypnotized by the shrink, a hand breaks through the desk and throws a coffee mug through the mirror. You can briefly see the reflection of the plexi-glass protecting the actors behind the mirror as the mirror breaks.
Revealing mistake: When Lance Henrickson's character gets killed, there's a close-up of his flashlight lying in the snow with a rivulet of blood flowing past it. It's very obviously fake snow, since there are snowflakes floating on top of the blood.
Revealing mistake: The film is set in 1891. After Holmes escapes from Parliament, Thomas Thornycroft's statue of Boadicea on the Thames Embankment next to Westminster Bridge can be seen, even though it was not completed until 1905. (01:35:45)
Revealing mistake: When Langdon and Victoria walk towards the Pantheon, the first two angles show them walking alone with some stunt-women behind. But in the third angle, a couple of seconds later, a huge line of people appears, lining perfectly in the back, watching the camera. Obviously a group of real tourists standing behind a security line watching the shooting.
Revealing mistake: When everyone jumps from the plane, all of the stunt doubles are easily seen - [Dr. Elliot's stunt double is ridiculously easy to spot!] (00:37:00)
Revealing mistake: Close to the end of the film when Joe is in the woods with all the bad guys, he starts to shoot them, as he shoots the first bad guy, if you pause it before he shoots, you can see that there is a rather large lump in the guys forehead where he gets shot, obviously some kind of squib or something to make the effect of being shot in the head. (01:13:30)
Revealing mistake: Just before Anthony Dawson is going to be stabbed to death by Grace Kelly with a pair of scissors, you can see for a very short moment that the scissors are already attached to his back.
Revealing mistake: After Beloved's ghost throws the dog against the wall its eyeball hangs out. In some shots the dog's real eye is visible too. (00:01:30)
Revealing mistake: After Raye has finished writing down the agent's names onto the piece of paper on the subway, the "dead" man next to him can be seen swallowing. (00:57:30)
Revealing mistake: After Majid commits suicide, when he is on the ground, you can CLEARLY see him breathing. I mean, it isn't even funny how much you can see him breathing.
Revealing mistake: When Yoichi's mother is killed, the blood coming from her body is very obviously just colored water, as it is too bright and too thin to really look like blood.
Revealing mistake: When Mombi's headless body wakes up and begins to walk towards Dorothy, you can see a black, blurry haze around her neck in two shots, where an effect was used to remove it.
Revealing mistake: Healy tears off the October 26 sheet from the calendar, and before the camera cuts away, it shows the October 25 sheet underneath it. That's not how calendars work. (00:11:25)
Revealing mistake: When William is running at the end, there is already a blood trail on the floor. Clearly from another take. (01:15:10)
Revealing mistake: When the car falls off the cliff it has no engine, clearly visible when the hood flies off. (01:12:10)
Revealing mistake: Just after the scene where the doctor asks Columbo to switch off the light before leaving, the detective does so, but it can be seen that both light switches are down before he does this, and that they are still both in the down position after he "switches off" the light.