Continuity mistake: 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 mistake: 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.
Continuity mistake: 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 mistake: 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.
Continuity mistake: The wound on David's back from being stabbed by the peace pipe at the end changes drastically. When we first see it, it is a very bloody wound on his upper back near his shoulders and head, but when we see it in the next shot, not only is it smaller and less bloody, but it also changes position to being further down in the middle of his back. (01:30:45)