The initial prototypes of the Beach" "Bomb were faithful to the shape of a real VW Type 2 "bus", and had two surfboards sticking out the back window, in a nod to the VW's perceived association with the surfing community and the slang term for a person who spends much time surfing - a 'beach bum'. During the fledgling Hot Wheels era, Mattel wanted to make sure that each of the cars could be used with any of the playsets and stunt track sets. Unfortunately, testing showed that this early version (now known among collectors as the Rear-Loader Beach Bomb, or 'RLBB') was too narrow to roll effectively on Hot Wheels track or be powered by the Super Charger, and was too top-heavy to negotiate high-speed corners.