a basic definition

"In its most basic definition, ghostriding the whip involves a car in motion with no one operating it. The closest thing that can come to describing ghostriding the whip is perhaps the Chinese fire drill that was popular back in the 1950s. However, unlike the Chinese fire drill the car remains in motion with no urgency to get back into it. In fact, the driver and passengers will walk next to the car as it casually rolls down the street, with thumping music playing at extreme volumes as the riders participate in free-form dance within close proximity to the car. Often the occupants of the vehicle will climb on the hood and roof, expressing themselves in dance high atop the automobile."