Continuity: In the scene where they are the roller coaster, Reese Witherspoon has nail tips on, then 20 seconds later she doesn't, then she does again.

Continuity: When William Petersen is on a cordless phone at work, he says "the guy gives me the creeps and the girl is my daughter." As he does, the phone cord appears, and the phone's position changes as he hangs it up.

Continuity: Near the end of the movie, when Mark has the mother and father bound and gagged, the mothers tape gag slips off and is magically resealed several times.

Continuity: There is a change of scene from an inside shot to an outside shot in the first hour of the movie. There is an extremely obvious skip in the film where it was edited.

Plot hole: At the end of the movie where David and his friends are attempting to break into Steve's house, David has the door code and attempts to gain access once by using it. Steve then tells his wife and the kids to go hide upstairs and turn off all the lights so nobody will know where they are. Then Steve and his wife go to another part of the house, away from the front door. Then, we hear David and his friends using axes and a big log to try and break down the door, "before* Steve secures the door with household appliances later on. Why wouldn't David have just kept trying the code?

Continuity: When David talks to Nicole in her Jeep, at one point her hair is over her shoulders. Then they show David again then back to Nicole and the hair is behind her shoulder and it keeps repeating through out the scene.

Continuity: At the end scene when Mark Wahlberg and his friend are attacking the girls in the bedroom, keep an eye on Reese Witherspoon's left shoulder. Her shirt repeatedly changes from torn and her bra strap showing to being intact and the strap covered up quite a few times within the scene.

Other: In the scene where Nicole opens her locker and a note from David falls out, the handwriting is exactly the same as the seen where Nicole leaves a note taped to the bedroom door for her father. Although the letters are larger, the same applies to the note on the father's vandalized car, which says he's popped both of their cherries.

Continuity: When the girl and hear brother are playing the video (before Mark Wahlberg and his friends try to break in), the game they are playing are from the Street Fighter series and the sounds coming from the game are wrong, those are Asteroid type sounds.

Continuity: When Mark Wahlberg is chasing after Alyssa Milano in his car, they go to a shot of her driving in the background it is water but when it cuts back to him it is trees, also a car comes in the opposite direction but it never passes any of them.