As the group is walking down the path, the flower appears on Scott's necklace before Carly picks it and puts it there.
The flower in Scott's necklace disappears and reappears between shots.
In the opening scene, the blood dropping on Halley's face changes position.
When Carly hides from Scott on the road, his collar is flipped up in one shot, down in the next, then back up again.
When Francine and Evan are sitting in front of the car, one of Francine's legs is alternately up/down between shots.
When Halley falls from the cliff her back is to the ground but when she lands she is facing the ground.
The Mustang has both front and rear Pennsylvania plates. PA doesn't use or require front plates, only rear ones.
When Chris takes the CD out when it starts to skip, he drops it and puts it back in. The song starts to play right where is left off. In real life this would not happen.
When the second trooper comes to inspect the house that was on fire and blew up, the wooden timbers are not charred and the other troopers uniform show no signs of burning.
2 women and a man escape from a field of wrecked cars in a break down truck driving with the lights on. Mountain men catch up to them, too quick for feasibility, No indication that the lights were switched off so they'd have been on all night causing a flat battery yet towards the end of the film it's back by the cabin.
When Scott is shot by the arrows, we see him fall. If you look closely at his leg when he hits the ground, you can plainly see a plastic tube that is pumping fake blood to his "wounds".
When Chris goes back into his car after asking the truck driver about the accident, he sits in the seat, and you can clearly see that it's the scenery that moves and not the car.
The three take refuge in a watch tower which mountain men set on fire but the doesn't spread to the trees or bushes.
Jessie Burlingame is running through the woods most of the time but her top stays perfectly white apart from a little bloodstain.
When Carly jumps from the watchtower to the branches of the trees below, she misses grabbing the branches and instead hits full force into a tree limb, landing on her side. This force would have crushed her rib cage but she is uninjured.
When Chris first picks up the double-barrel shotgun in the cabin, it makes a noise like a pump-action.
At the start of the film a man and woman are climbing a cliff face. the man gets to the top is killed and thrown off the woman, who's tied to a rope, starts to be pulled up, cuts herself free, has a long fall then gets up and walks away uninjured. Apart from the unlikely hood of that where or what was her rope tied to?
One of the mountain men having climbed high up in the trees is knocked off and should have had broken bones if not been killed yet in the final scenes at the cabin he's there completely unhurt.