by Stephen King
As the Earth crosses the tail of a comet, previously inanimate machines suddenly spring to life; an ATM insults a customer (King in a cameo) and a bascule bridge rises during heavy traffic, causing all vehicles upon the bridge to fall into the river or collide. Chaos sets in as machines of all kinds begin attacking humans. At a roadside truck stop just outside Wilmington, North Carolina, an employee, Duncan Keller, is blinded after a gas dispenser sprays diesel in his eyes. A waitress, Wanda June, is injured by an electric knife, and arcade machines in the back room electrocute another victim. Employee and ex-convict Bill Robinson begins to suspect something is wrong. Meanwhile, at a Little League game, a vending machine kills the coach by firing canned soda point-blank into his skull. A driverless steamroller flattens one of the fleeing children, but one named Deke Keller (Duncan's son) manages to escape on his bike.
A newly-wed couple, Connie (Yeardley Smith) and Curtis (John Short), stop at a gas station, where a brown tow truck tries to kill Curtis, but he and Connie escape in their car. Deke rides through his town as humans and even pets are brutally killed by lawnmowers, chainsaws, electric hair dryers, pocket radios, and RC cars. At the truck stop, a black Western Star 4800 sporting a giant Green Goblin mask on its grille runs over a Bible salesman after a red garbage truck kills Duncan and dumps some of the junk on the Bible salesman’s car to make him so angry that he insults its “driver”. Later, several big rig trucks encircle the truck stop.
Meanwhile, Connie and Curtis are pursued by a truck, but they make it crash off the side of the road as it exploded. They arrive at the truck stop and try to pass between the trucks, but their car is hit and overturns. Bill and Brett, a hitchhiker, rush to help them, but the trucks attack them. Bill's boss Hendershot uses M72 LAW rockets he had stored in a bunker hidden under the diner to destroy many of the trucks. Deke makes it to the truck stop later that evening and tries to enter via the sewers, but is obstructed by the wire mesh covering the opening. That night, the survivors hear the Bible salesman screaming in a ditch, and Bill and Curtis sneak out to help him by climbing through the sewers. Deke finds the Bible salesman and believes he is dead, but he suddenly jumps up and attacks Deke. Bill and Curtis rescue Deke, and a truck chases them back into the pipe.
The next morning, a Caterpillar D7G bulldozer and an M274 Mule drive through the diner. Hendershot uses the rocket launcher to blow the bulldozer away. The Mule fires its post-mounted M60 machine gun into the building, killing several people. The Mule then demands, via sending morse code signals through its horn that Deke deciphers, that the humans pump the trucks' diesel for them in exchange for their lives. The survivors soon realize they have become enslaved by their own machines. Robinson suggests they escape to a local island just off the coast, on which no motorised vehicles are permitted. While the crew is resting, Robinson theorizes that the comet is actually a "broom" operated by interstellar aliens that are using our machines to destroy humanity so the aliens can repopulate the Earth. During a fueling operation, Robinson sneaks a grenade onto the Mule vehicle, destroying it, then leads the party out of the diner via a sewer hatch to the main road just as the trucks demolish the entire truck stop. The survivors are pursued to the docks by the Green Goblin truck, which manages to kill Brad the trucker. Robinson destroys the truck with a direct hit from an M72 LAW rocket shot. The survivors then sail off to safety. A title card epilogue explains that two days later, a UFO was destroyed by a Soviet "weather satellite" conveniently equipped with class IV nuclear missiles and a laser cannon. Six days later, the Earth passes out of the comet's tail, and the survivors are still alive.