Other mistake: When the priest is singing to himself in the garden, you can hear a person off camera say "go" just before the mayor enters.
Other mistake: The scene where Clear is in the garage, she puts the car in drive, but somehow reverses the car through the garage door. (01:24:49)
Other mistake: During the Toros last routine at the Nationals competition, they throw two girls in the air while they're lying horizontally. Look at the group standing around the people throwing the girl on the right; you can see one of the guys lift his arms up as if to cheer and then looks behind himself to watch the others.
Other mistake: After Professor Alcott gives back the papers, he dismisses them. A girl then comes up, and you hear him saying something to the extent of "That's the grade we use for failure. See me after class." Didn't he just end the class?
Other mistake: When Nick thinks he is going to be promoted he talks to his PAs about moving to the 44th floor. In the shot of the office building (after he leaves the coffee shop on the way to work) it's obvious that the building only has about 10 floors.
Other mistake: At the start just after Drew is seen in the line of the sprinklers, the killer is seen walking towards her with his knife held high in his right hand. If you look closely in this shot you can see blood on the knife despite not stabbing Drew yet. In the next shot it is gone. (00:03:45)
Other mistake: How did the murderer manage to remove the robe, put the wig on perfectly, and still be only a few seconds behind Jody and Kenny despite the fact that Jody and Kenny got at least a 5 minute start?
Other mistake: Bruce Willis's character has a very clear scar on his forehead in some scenes (I think it's on the right as you look at him) - doesn't really fit the whole "unbreakable" theory. You'd think they could have put some makeup on it...
Other mistake: At the beginning of the third chapter ("El Chivo y Maru"), when the Comandante and Gustavo are driving to see Chivo, the Comandante says to Gustavo, "Make a right here."; however, Gustavo ignores him and never makes a right. He just keeps going straight.
Other mistake: When Mac and Sydney are in the boat waiting to get the diamond, the boat tips and Sydney's wig starts to come off. The same thing happens when they fall down the steps.
Other mistake: After Jody, Charlie, and Cooper take their last curtain call, the shot goes backstage. Sergei yells at Eva, "You! I'm gonna kill you!" presumably because she surprised him by taking Maureen's place. Eva responds, "I'm so sorry. I wanted to tell you." And they argue playfully and then hug. But it's been a long time [the entire length of Cooper's ballet] since their ballet finished. And we saw the backstage scenes immediately after Cooper's ballet and after the Italian Symphony ballet, and everyone had a chance to talk right then. And Eva and Sergei finished their ballet in each other's arms. So they should have had that whole conversation a long time earlier. Even if real ballet dancers wouldn't be permitted to talk after a performance, the dancers in this movie are shown speaking freely to one another backstage as soon as the curtain falls. (01:44:05)
Other mistake: When the children first hit the principal with a snowball, the steak he is cooking lands onto a lawnchair. A few seconds later, his dog picks it off from the ground, and not from the chair.
Other mistake: Mr. Gellar never ages. We see a flashback of him when he kills Sarah's Dad when Sarah was a little girl. When Sarah is a detective, he still looks the same.
Other mistake: In the scene where Duncan has been captured by the Watchers and restrained in the upright table, take note of the needle. The camera pans around the Watcher's head and then shows the syringe delivering its contents. Once the dose is fully administered, it can clearly be seen that there is no needle on the end when he holds it down near the Highlander's chest.