When I was a young construction worker, we were assigned a beat up old International crew cab for a work truck. The parking brake was toast. We stopped at a coffee shop, and parked on an incline, but the truck kept rolling back. Quickly thinking, I jumped out and stuck my fiberglass hardhat behind the wheel. When we left the coffee shop, we forgot about it, until the truck tire was squarely on top. That lasted about five seconds, until the hardhat shattered and collapsed. Unfortuantely, we had run into the department director and the superintendent at the coffee shop, and they saw the whole thing. The hardhat problem was nothing, compared to the chewing out I endured. Do not use your helmet to block the Spyder wheel. :roflblack: