Started out in stand-up as one-half of the comedy team "Burns & Carlin" with George Carlin . After the duo broke up, Jack went on to become a member of the famed Second City comedy troupe in Chicago, where he met Avery Schreiber . He and Schreiber would perform as a comedy team for several years before Jack would go on to become the head writer on the first season of "The Muppet Show" (1976).He can currently be heard on radio stations in a series of commercial spots, starring Vince and Larry, the crash test dummies. The series of commercials -- of which there are currently three -- are new versions of a series of TV ads, which Burns did with the late Lorenzo Music . Burns is the voice of Vince.