Frankie Muniz made his Dancing with the Stars debut on Monday -- a feat which is even more impressive once you know what the former child star has overcome. During the show's premiere, Muniz revealed that he survived a terrible racing accident which left his body mangled. "I had a crash and broke my back and injured my hands and ribs," he explained to his partner Witney Carson. Following his breakout role as the lead in the sitcom Malcolm in the Middle, Muniz appeared projects like The Simpsons and Agent Cody Banks before putting acting on hold to become a race car driver.