the creeper races of 1982, part of the games at the Goodguys events, a natural progression of foot powered hay bale course racing on a shop creeper - that went mechanized. Proof that anything can be hot rodded

they began as simple shop creepers, but with the addition of weed eater motors, and hand fabricated "creepers", and exotic fuels, they went from mild to dangerous, and disappeared when faced with legal liabilities

https://www.fuelcurve.com/creeper-races/