MAXIMUM OVERDRIVE

On June 19, 1987, as the Earth crosses the tail of a rogue comet, Rhea-M, previously inanimate machines spring to life; an ATM insults a customer (Stephen King) 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 begin attacking humans worldwide automatically. At the Dixie Boy Truck Stop outside Wilmington, North Carolina, employee Duncan Keller is blinded after a gas pump sprays diesel in his eyes. After an electric knife injures waitress Wanda June and arcade machines in the back room electrocute a customer, cook and paroled ex-convict Bill Robinson begins to suspect foul play. Meanwhile, at a Little League game, a vending machine kills the coach by firing canned soda at him. A driverless road roller flattens a fleeing child, while Duncan's son Deke escapes on his bike.

Newlyweds Connie and Curtis discover a corpse at a roadside gas station, but escape in their car when a tow truck attempts to kill Curtis. Meanwhile, humans and pets are murdered by lawnmowers, chainsaws, electric hair dryers, pocket radios, RC cars and an ice cream truck. At the Dixie Boy, a garbage truck kills Duncan when he departs to search for Deke, and a truck sporting a giant fiberglass Green Goblin mask on its grille slams bible salesman Camp Loman into a ditch. Later, big rig trucks encircle the truck stop.

Connie and Curtis outmaneuver a semi-truck, causing it to crash off the side of the road and explode. They arrive at the fortified truck stop, where it is safer than out in the open. As they try to pass between the trucks, their car is hit and overturned. Bill and hitchhiker Brett Graham rush to help them before the trucks attack. The owner Bubba Hendershot uses M72 LAW rockets he had stored in a bunker hidden under the diner to destroy many of the trucks. Deke later arrives at the Dixie Boy and attempts entrance via the sewers, but is obstructed by the wire mesh covering the opening. That night, the survivors hear Loman screaming, and Bill and Curtis sneak out via the sewers to help him. Deke discovers Loman, believing him dead, but he awakens and attacks Deke. Bill and Curtis rescue Deke and determine that Loman is indeed dead, but a truck then chases them back into the pipe.

The next morning, a bulldozer and a platform truck drive to the truck stop. The angered Hendershot uses the rocket launcher to blow up the bulldozer but only succeeds in blowing its roof off, but the platform truck fires its post-mounted machine gun into the building, killing many including him and Wanda. The truck 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.

As the survivors realize that their own machines have enslaved them, Bill suggests that they escape to Haven, an island off the coast, on which no motorized vehicles are permitted. While the crew rests, Bill theorizes that the comet is actually a "broom" operated by interstellar aliens that are using Earth's machines to destroy humanity so the aliens can repopulate the Earth. The next day, during a fueling operation, Bill sneaks a grenade onto the platform truck, destroying it, then leads the party out of the diner via a sewer hatch to the main road just as the trucks and the bulldozer demolish the entire building. As the remaining people approach the marina, the ice cream truck appears, but Brett and Curtis open fire and destroy it. The Green Goblin truck stalks them to the marina and kills Brad, a trucker distracted by a diamond ring on a corpse's finger. After Bill destroys it with a hit from a rocket shot, the survivors board a sailboat and set sail for Haven.

Two days later, the machines go silent when a UFO hiding in the comet's tail is destroyed by a Soviet space platform disguised as a weather satellite, equipped with nuclear missiles and a laser cannon. Six days later, Earth passes out of the comet's tail, and the survivors are still alive.

The surviving group at the truck stop manages to fight off the murderous machines and plans to escape to an island where no motorized vehicles are permitted.

The climax sees the humans reclaiming some agency against their mechanical oppressors, using ingenuity and limited weaponry to survive. The decision to head for an island without vehicles underscores the film’s theme of technological dependence turned deadly, closing with the survivors seeking refuge in a world where technology can no longer betray them. It’s a wry commentary on our uneasy relationship with machines, filtered through Stephen King’s anarchic sense of fun.