Belt sanders were one of the first power tools used in the growing field of power tool drag racing wherein a pair of stock or modified belt sanders are placed in parallel wooden channels and fitted with long extension cords. Each heat begins when a common switch or individual switches triggered by the racers energizes them, causing the sanders to race towards the end of the track spitting wood dust along the way. Stock sanders race down a 50' long track, while modified sanders race on a 75' long track.
So says Wikipedia.
