lusk left disney in 1960, but continued to work as an animator during the 1960s and 1970s. aside from animation, lusk also directed multiple cartoon films and series, including the "peanuts" tv specials and movies and for the hanna-barbera studio. his work at the latter included "the flintstones", "the jetsons", "scooby-doo", "the smurfs", and "tom and jerry".