Continuity mistake: After Henriksen is killed, Chelsea and Jake are shown driving down the road. At first there is no license plate visible on the rear door of her SUV. A few shots later the license plate appears.
Continuity mistake: When Adam's father starts playing with the box at the end, he has a just-lit, long cigarette in one hand. The shot cuts for only a second and the cigarette has burned down almost to his knuckles.