Factual error: When Bruce Willis is looking at his old high school news clippings you see a professional baseball score on one of the newspaper clippings. The game was Pittsburgh vs. Arizona Diamondbacks. The Diamondbacks were not a team yet when he was in high school.

Character mistake: In the final scene, one of the newspaper clippings on the killer's office wall reads something like, "Huge Mudslide in Mexico: All Killed Expect Newborn." The penultimate word should be "except."

Continuity: In the scene where David is looking through the newspaper clippings, he flips through them, and if you watch carefully, you will see one of them appear twice.

Revealing: When Bruce Willis is in the hospital, the doctor comes up to him and asks Bruce to look at him. The doctor proceeds to get a torch out and shine it into his eyes. Yet there is no light coming out of the torch.

Continuity: After David returns from the hospital he pauses at the bottom of the stairs. First his watch is visible then in the next shot it's covered by his sleeve only to be exposed again in the next shot.

Factual error: When Elijah first meets David at the gallery, he says that he has Osteogenesis Imperfecta Type 1, which is the mildest form of the disease. But Elijah then states that there are types 2, 3 and 4, and that type 4's don't last very long. The types are not in order of severity, type 2 is the most severe form. Type 4 is actually one step more severe than type 1.

Continuity: After Willis rescues the people, he's at breakfast with his son and wife. He slides the newspaper to his son. Close-up on paper (beside orange juice) shows "Bold" typestyle on story slug. Camera pans up to Willis, cuts to son, cut back to newspaper. Suddenly typestyle is italicised (noticeable on "f" in "found").

Continuity: In the final scene of Samuel L. Jackson's office when we first see Jackson wheel himself down the last ramp towards his desk, three computer towers sit below the desk - two off to the left side, one off to the right with space between to wheel his chair up underneath. After the scene cuts to Bruce Willis and then back to Jackson, the two towers on the left have been moved closer to the one on the right.

Continuity: The train derailed "just before" (according to the news) 3:20 pm, as seen in the scene where Joseph watches the news on TV (clock over the TV). But when David reads the newspaper later when lying in bed with Joseph the newspaper says it derailed at 9:34 am. Seen on DVD (European Version)

Continuity: In the scene where Bruce Willis comes up from behind the killer in orange, he makes him drop his beer he's been drinking, but when they show the beer on the ground during the fight there is none spilled on the floor.

Visible crew/equipment: When David gets off the Bus to see his son playing football the boom mic is visible. Look closely to the far left of the screen in the reflection of the bus window and you'll see the large stick like mic briefly.

Continuity: After Bruce Willis has made his son put the gun down, he picks it up. His left hand very clearly reaches out and grabs it, but in the next shot he's got it in his right hand.

Continuity: In the scene where Bruce Willis is sitting at the table with his wife and son, there is an orange juice container on the table, the type of container that is a carton but has a screw on cap on the top. When Bruce's son is about to sit down at the table, the cap on the OJ carton is facing Bruce. When the camera focuses on the child, the cap is facing the boy, and no-one had touched the carton.