When the family makes it back to the rest stop, the phone is on the hook. After Jim Henley tries to make a call, he puts the phone back on the hook. In the next shot, it's off the hook, then, back on the hook later.
When Jim Henley finds his Excursion at the car graveyard, and gets away, as the SUV jumps over the cliff, it is very dirty, and dusty, in the next shot as it's driving away, it is clean
The SUV used in the movie is a Ford Excursion Limited, yet in the getaway scene, it changes between an Excursion, and an older model of the Chevrolet Suburban.
Just after the opening credits the Henley family pull into a gas station in their Ford Excursion and Jim Henley asks the pump attendant to fill it up with premium gas. Later in the movie at around the nineteen minute mark the Ford Excursion will not start, Jim Henley opens the hood revealing a 7.3 liter PowerStroke turbo diesel engine, this engine would not run on premium gas.
After the Ford Excursion crashes through and collapses a large wooden building, it sustains no obvious damage to the body or tires.
At the start of the film, the camera car can be seen reflected in the side of the SUV driven by the family.
When Jim Henley is looking for Ethan, just before finding all the cars, you can see the camera crew in the reflection of his sunglasses.
When Matt Henley climbs down the rope to help Patty in the mine, you can see he is wearing a climbing harness when he descending and ascending.
When Jim Henley is looking for Ethan, just before finding all the cars, you can see the cameraman in the left of the screen.
In the opening scenes, a close up of a lizard on the road is seen. The lizard is a "Sleepy" or "Shingleback," an Australian lizard (giving away that it was filmed in South Australia)
The box cover claims that the setting is New Mexico, but the Sheriff's Jeep has Nevada licence plates.