1. HHGttG | Bulldozer

Bulldozer (noun)

A large, typically yellow machine that is employed by various planetary governments and construction companies to push around vast amounts of dirt, rocks, and occasionally, the odd stranded hitchhiker. Often seen sporting an expression of mechanical indifference, it is known for its single-minded dedication to flattening everything in its path, be it terrain, small forests, or the homes of unsuspecting Earthlings.