Continuity mistake: When El Blanco is outside Burt's home, and leaves, there isn't any hole in the ground after him. Later, in the movie, when El Blanco gets underneath the earth, he leaves a big hole after him. Why wasn't it like that the first time?
Factual error: Burt claims his watch updates its time "by connecting directly to the cesium clock in Colorado via ultrasonic frequency." Later the graboids home in on him by the ultrasonic sound emitted by his watch. Firstly, radio controlled watches update their time by receiving signals, but they don't emit any signals - the battery would be way too weak for two-way communication. Secondly, they work on radio waves, not sonic waves. Thirdly, if a hypothetical time transmitter did work on ultrasonics, the smallest distance between Colorado and Nevada is some 435 km (around 270 mi). An ultrasonic signal strong enough to reach that far would probably be deadly within a sizable range around the transmitter. (00:08:20)
Continuity mistake: When Burt is at the gas station, he makes change with the box top of the pump. he closes the box. Jack approaches to meet him and the shot cuts to Jack and the rock is all ready on top of the box. we cut back to Burt and he is placing the rock on top of the box.
Trivia: The woman who accidentally calls Burt Gummer (Michael Gross) "Mr. Goober" is actually played by Michael Gross' sister Mary. Like her brother, she's an actress who was a co-star on Saturday Night Live for several years in the 80's, and has done a smattering of film, television and voice-acting roles since.
Trivia: The scene where a kid accidentally refers to a Graboid as a "Tremor" was a bit of an inside joke, as it's a common misconception among people who aren't fans of the series that the monsters are called "Tremors." It's always slightly annoyed the cast and crew, so they added the scene as a goof.
Miguel: The BLM man gave me permission to kill anything that represented a danger to my cattle. El lobo, el coyote, and el Graboid.
Burt: A lifetime of preparation, and I end up a refugee?
Jodi Chang: Well, we discovered it right? Just like the other ones. We should name it... how about buttlauncher?
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