 Grave Digger's origins, the imagery associated with the truck, and the truck's wild reputation, are all considered part of the mystique of the truck and have contributed to its continued popularity.The paint scheme, which combines green flames, letters dripping blood, a foggy graveyard scene with tombstones bearing names of competitors, a haunted house silhouetted by a full moon, and a giant skull-shaped ghost, has not strayed far from the first incarnation of the paintwork from 1986.Perhaps the most visible trademark is the red headlights which glow menacingly whenever the truck is in competition.