I remember when Don Knotts was a "man on the street" on the old Steve Allen Show. He was a total wreck who shivered and shook while answering questions (Louis Nye and Tom Poston were the other guys along with Bill Dana). His frenetic behavior made a career for him and he never disappoints, so when he gets a chain letter that threatens him, he goes absolutely bonkers. He starts making bad decisions, but blames them on his not sending the letters on. He blames Andy for all his misfortune because Andy told him to throw the original away. A real Barney episode.