Sprint car racing champion Cory Kruseman knows the discipline better than most. He teaches sprint car racing at his school on the Ventura County Fairgrounds in California. Kruseman knows Tony Stewart well and was able to give us some insight into a key question: Why wound a three-time NASCAR Sprint Cup champion race up to 100 times a year on small dirt tracks in a rough-and-tumble sprint car? It’s not easy for everyone to understand.