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Mistakes

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. See more...

Trivia

When Mindy is getting her picture taken next to one of the graboid's tongues, look at the shelf of movies behind her when the camera zooms out its farthest in that shot; in the second row down (I think it's the in the second row down), if you look really closely, you can see that one of the movies is Tremors. See more...

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Movie Mistakes blog

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Tremors (1990) - 19 corrections

Directed by Ron Underwood, starring Fred Ward, Kevin Bacon, Michael Gross (add more)

Genres: Comedy, Horror, Sci-fi

Comments made in brackets are corrections from other visitors. To submit your own corrections for mistakes, just click "edit" under an entry, then choose "correct entry". You can also submit corrections for corrections, if you think a mistake has been unfairly removed.

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When the station wagon is found buried, not only is the radio on but the headlights are as well. Given the attack occurred at night and it is now mid-morning and the fact that the car can't run underground, even the best car batteries can't last more than an hour. [The best car batteries will last a lot more than an hour. I've left my lights on accidentally when I parked for work and found them still on 8 hours later. Car started up just fine too.]
Edit Corrected by Phixius
When Rhonda has just dug a hole to bury the sensor, the shovel is spotless, but it should have at least been dusty from digging. [Wouldn't be dusty if the soil was solid enough, and there's been a surface treatment for metal to keep soil from sticking to it since the early industrial revolution.]
Edit Corrected by Phixius
The radio that was taken up onto the roof was not battery powered and should not have continued working because it was no longer plugged into an electrical outlet. [Not necessarily. It is possible it is battery powered. I have had many radios this large in the past that have both battery and AC power.]
Edit Corrected by manthabeat
When Val and Earl and trying to get away in the truck, Earl scolds him saying "You're gonna burn the clutch!" In earlier scenes you can see that their Mazda B-series truck is an automatic. [Automatic gearboxes have clutches - centripital ones, which can burn out.]
Edit
Since Carson City is so close to Perfection (as evidenced in Tremors 4), why didn't Val and Earl make a run for there, instead of Bixby? Carson City was due South, whereas Bixby was to the Northwest, in the direction the graboids were coming from. [Because there's only one road out of town and it's blocked. They had to go off road, driving a big tractor dragging a trailer with four flat tires. Carson City is close, but Bixby is closer. That's all that matters to them. They figured the graboids couldn't touch them in the tractor and trailer so they didn't care where they were coming from.]
Edit Corrected by Phixius
When Val is being lowered from the roof into the store to get the radio, he snaps the antenna off on the window as he pulls it out. In the next shot, it is on again. [No. The antenna stays on the radio.]
Edit
When Val and Earl are pumping out a septic tank, the hose springs a leak and sewage jets out all over them. In real life, these hoses suck (negative pressure, like a vacuum cleaner), so if the hose had a hole, it would just suck air through the hole, not shoot out liquid. [It appears the tank used is homemade, and that the hoses are stored on it when it travels. It's entirely possible that Val or Earl reversed the in and out pipes. It's implied earlier a few times that they aren't great handymen.]
Edit Corrected by Grumpy Scot
There is absolutely no way that a sheep farmer could survive in a desert environment. The farm is shown to be set in scrappy scrubland and sand - nothing that a sheep could eat is shown. (Apart from this, the heat would kill them.) Cows maybe - they could eat the scrub. Grass eating sheep, never. [My father raised sheep in a similar environment, they are fed hay by the farmer and the wool coats of the sheep actually act as an insulator from the heat.]
Edit Corrected by OneHappyHusky
Val runs to save Mindy who is jumping on her pogo stick. When he snatches her off of it, the pogostick stays standing completly upright. The camera cuts to Val, Mindy and Mindy's mom. They have a bit of dialogue. It cuts back to the pogostick that's standing straight up, and the graboid sucks it into the ground. It would have had to have been standing for around 5 seconds before the graboid got to it, on its end and unsupported. [Not impossible. Seen it happen.]
Edit Corrected by Phixius Time
When Old Fred is eaten, he's holding a hoe. When Val and Earl find him, the hoe is nowhere to be seen. It's been established that the snakeoids spit out things they can't eat (the generator, the bomb) but we see a wide area around where Fred was, and no sign of the hoe. Yes, it could have been spit VERY far away, but in the other instances the objects are still in the vicinity of where they were eaten. [Self-correcting entry. Like you said, it could have been spit very far away.]
Edit Corrected by Jazetopher
Rhonda does a pretty good job on keeping her truck on the road, especially considering her head is below the wheel. [Yes, she does. But since the road is straight, and we only see this scene of her driving that way for about 5 seconds, it's not hard to believe that she could hold the wheel straight for that short amount of time.]
Edit Corrected by Jazetopher
When we first see Val and Earl in Chang's market, Val tells a joke about surviving World War 3 to Burt; you can obviously tell that Earl starts laughing before Val gets to the punch line. He quickly takes a huge swig of beer to cover it up. [If Earl had already heard Val tell the joke before or that knew that Val was going to make the joke, which is likely considering they are friends, he could be reacting to the punch line that he knows is coming.]
Edit Corrected by Jazetopher
When Earl and Val stop to warn the sandblasters that there is a 'psycho killer' on the loose, Earl is talking frantically but if you look at Val, he doesn't look at all phased - surprising considering he just found half a chewed human head and a herd of chewed sheep. [Earl is the type of guy who would be acting frantic about the dead guy they just found, but Val appears to be in shock, not un-phased by it. This fits his character like a glove, as is noticed when he calmly (he's in shock) says that they waited one day too long to leave town.]
Edit Corrected by Jazetopher
After Earl, Val, and Rhonda pole vault to the last rock, there's a shot of Earl's feet landing on the rock. But when the camera pulls back, he is holding his pole facing forwards. If he had just pole-vaulted to the rock, the pole would be behind him, and he probably wouldn't have landed so smoothly either. [He didn't pole-vault to it. He just jumps down from a rock as you can see two shots later is lying right behind him.]
Edit Corrected by Mortug Time
It seems as though both Burt and Heather should be at least temporarily deaf after the lengthy gun battle against the monster in their basement, given that they weren't wearing any protection over their ears. [They may have indeed been temporarily deaf but we dont know how much time passed before they killed the graboid and then they broadcasted their vicotry. They could have had time to recover.]
Edit Corrected by Spaceboy_007
When the doctor's wife is in the station wagon, there's a coffee cup on the dash at first. In later shots it disappears. [It disappears because as the back of the car is falling into the sankeoid's hole, the front of the car is being tilted up. The cup surely falls off the dashboard.]
Edit Corrected by Krista
When Val & Earl are leaving Perfection, they have everything they own in the pickup truck. When they get Edgar down from the tower and take him to the doctor's home, there is nothing in the truck. Scenes later when the "grab-oid" is attacking Val & Earl's truck in town it is full again. [It is possible that Val and Earl decided that bringing a body to a doctor is a little more important than possessions so they left them by the place where they found Edgar and went back to get them when they dropped the body off.]
Edit
In the start of the movie Earl, and Burt can't leave Perfection because the road is "blocked" the rocks falling. Why didn't they just drive around the rocks on the shoulder? Or if they really wanted to leave just take down a barbed wire fence, drive over it, and put it back up? These guys were experienced cowboys yet a little pile of rocks stopped them dead in their tracks. [If you watch, the road cuts through a levy,(dirt wall) which seems to go for a long while. Maybe the trucks couldn't climb it.]
Edit
When Val gets the cat to go to the mountains, he pulls a trailer semi. When he is tying the chain to connect the cat to the semi, there's dirt in the semi. Later when everyone is in, the dirt is gone. [The sand is not gone, as you can see the people standing on it, there is a big pile of it in the back of the semi and many individuals walk over it.]
Edit