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 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 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 is climbing up the electrical tower to get Edgar down, at first the sky is blue, then suddenly it's overcast. (00:13:40)
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: At Dr. Jim's when he is standing by where the generator should be, you can see several items around. When it cuts all the items has moved. (00:22:40)
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 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 Val, Earl and Rhonda are on the rock and decide to pole vault off, Rhonda's backpack is flat when she scrambles down the rock, but appears full once she reaches the bottom. (00:40:20)
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 Walter names the monsters Graboids he puts his hands down. When it cuts he holds both arm against his waist. (00:45:05)
Continuity mistake: In the scene where Walter is being attacked by the Grabbloid, the blood coming from his nostrils, and blood on his upper lip, changes between the first and second shot. (00:51:20)
Continuity mistake: When all pole vault, Fred is holding the pole in his right hand palm up. Then he goes 1/2 the distance and returns to the start but his right hand is palm down. (01:00:00)
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: When they are picking up Burt and Heather, Burt throws a sack to Val. When it cuts Val catches a totally different sack. (01:11:55)
Continuity mistake: When Val is getting the fuse lit on his bomb to throw to the last Graboid, we see his hands separated, one holding the bomb and one holding the rope. The camera angle changes to a close up of his hands, where they are now both holding both the bomb and rope. (01:24:50)
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: 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: 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.
