Smith is precocious in more than just his acting ability. After months of intensive martial arts training, he developed the physique of a much older boy, and he has also earned a reputation as a lively and witty interview subject. ("Do you know how to sew? 'Cause I'm ripped," he quipped to an interviewer.) Father Will Smith admits, "This kid is funnier than I was at his age. But then, he did have me as a father."earning Smith praise for his impressive acting and kung fu skills. Chan praised Smith's dedication to his martial arts training, saying, "He put my son to shame!" Smith also ventured into the world of music in conjunction with his work on the film, recording its official theme song, "Never Say Never," in partnership with child pop sensation Justin Bieber.