Corwin was riding his KX 250 dirt bike on a dirt track in Oroville on his 25th birthday. He went around the track a few times. On one of the laps, he landed wrong, and whiskey throttled. Instead of jumping the next jump, he went off the track. While slowing down, he hit a small dirt mound that shot his back tire up and flipped him over the handlebars—breaking his back.