When a comet passes close to the earth, machines all over the world come alive and go on homicidal rampages. A group of people at a desolate truck stop are held hostage by a gang of homicidal 18-wheelers. The frightened people set out to defeat the killer machines ... or be killed by them.
a child's head gets GRAPHICALLY squashed by a sentient steamroller with crushing noises and screaming. very jarring to those who are watching for first times