Don't know what this is called, a tail drag? A butt drag on the carpet? A boot scoot? It was damn cool anyway, and I've no idea how they balanced the truck to move on it's taillights. San Diego Monster jam, Time Flies is the truck

 I just clicked off 3 photos manually while it was on it's tailgate... so that shows a couple seconds at least with no tires on the dirt

at the one minute mark