Hillbilly

The Hillbilly (sometimes called the Drifter) is an orange/blue car that drifts around in circles in the Field

The only way to destroy the Hillbilly is to hit it with the Boulder of Death, which will cause it to explode.

It's also possible to make the car completely harmless by toasting it with Toaster Goat mutator.

If the goat is in the Hillbilly's way, it will hit the goat, sending it to fly.