I'm trying to remmeber stuff about this movie, but it's not much.

A car is kidnapping some kids (one girl gets her foot stuck in a cow grate while the car is after her.)

One of the kid's mom goes to get a kid from the car, and she chases him in a school bus, and at the end, the car drives off a cliff (into a mining hole or something) and crashes onto an explosive shack... that's all I can think of.