Continuity mistake: When Rhonda climbs out of the ditch with Earl, where the graboid has killed itself, her backpack is slung over her right shoulder and hanging in front of her. In the next shot when she's standing up, the backpack is on her back.
Continuity mistake: When they are picking up Burt and Heather, Burt throws a sack to Val. When it cuts Val catches a totally different sack. (01:15:07)
Continuity mistake: When Rhonda, Earl and Val are pole vaulting from rock to rock, if you look closely you can see that the poles are a lot longer than when they first picked them up off the ground. (00:40:30)
Continuity mistake: When Val and Earl are being chased by the graboid in the first shot it appears that the graboid is going perpendicular to the fence (you can see this because of the wires that cross it). But in the next shot the graboid appears to be going parallel to the fence. (00:33:20)
Suggested correction: The graboid made a turn.
Continuity mistake: When we see Rhonda placing a sensor to the ground we see her throwing her cap to the ground. When it cuts the cap has moved closer to the hole in the ground. (00:08:25)
Continuity mistake: When they all are trying to lure the graboids away from Val, Rhonda looks down the pipe running down the from the water tank. A piece of cloth soaked in water is tied around the pipe and water is dripping from it. When it cuts to Rhonda climbing down the water has stopped dripping. (01:08:45)
Continuity mistake: In the movie, Earl's last name was Basset, but in the credits, his last name was Bass.
Continuity mistake: When the snakeoid is chasing Val and Earl after they lose their horses, they run along a fence and the monster causes all the fence posts to fall over backwards. But shortly after, all the fence posts are seen to be upright, although some are tilted a little to the right.
Suggested correction: We only see 4 fence posts fall over in total. Considering there are probably 50+ fence posts there, I don't see how this can be an error.
Continuity mistake: When Valentine and Earl gets to Chan's, you see Heather packing some stuff into a box. She then takes a ketchup bottle in her left hand and a spray box in her right hand. When it cuts she is holding the ketchup in her right hand. (00:07:30)
Continuity mistake: When Dr. Jim and his wife are backing away from where the generator was, you can see them moving towards the car behind them. When it cuts, they are now facing the car. (00:23:35)
Continuity mistake: When Val's bomb gets spat back to the rock and scatters the gang, three of them wind up far away from the rock - too far to have made it in the time of the scene.
Continuity mistake: At the end, as Val and Rhonda are talking, Val's hat brim is flat. Rhonda walks off, and Earl slams the hood of the truck. When they show Val again, the brim of his hat is curved upwards.
Continuity mistake: When Val drives the dozer to get Rhonda off the water tower, he has the bucket up for her to get down. After she's safe, he drives on, and the bucket is down without his having lowered it.
Continuity mistake: When the worker is drilling the ground you see his mouth is clean. When it cut, his mouth is now covered in mud. (00:17:15)
Continuity mistake: When Valentine climbs up to get Edgar you can see a green mark under Edgar's shoes. When we see Edgar lying in the car the green mark is gone. (00:13:40)
Continuity mistake: When Val and Earl are relaxing with a couple of cold ones after they bury the trash, Val's recliner chair changes. From the side it is a brownish-rust color cloth material. In the next shot, from the front view, it is greenish leather. This scene takes place after Rhonda's near miss with the graboid but before the first guy, old Edgar, is found dead.
Continuity mistake: When the "graboids" are testing the buildings, they test the house with the mother and daughter on it. Watch the sky in the background. It goes from sunny to overcast, then back to sunny in a matter of seconds.
Continuity mistake: Near the end before Val throws the last bomb,. He twirls the fuse leaving a stub left, which Rhonda lights. Val throws the bomb, and the fuse has grown a few inches. (02:00:00)
Continuity mistake: Reba gets out of their truck at the compound and looks through the binoculars - in the foreground you see the tractor and trailer they use to escape are very close together, or are attached already. When Kevin Bacon and the other guy figure out to use it, the camera pans around and the tractor and trailer are 60-100 feet apart.
Continuity mistake: When Walter names the monsters Graboids he puts his hands down. When it cuts he holds both arm against his waist. (00:45:05)
