The Jerk: That wild and crazy guy Steve Martin makes his acting debut in this wild and crazy comedy hit The Jerk. Steve portrays Navin Johnson adopted son of a poor black sharecropper family whose crazy inventions lead him from rags to riches and right back to rags. Along the way he's smitten with a lady motorcycle racer survives a series of screwball attacks by a deranged killer becomes a millionaire by inventing the ""opti-grab"" handle for eyeglasses - and shows why he's the hottest comic performer in America today. The Jerk Too: This TV movie sequel stars Mark Blankfield as Navin Johnson the eponymous 'hero'.