Nielsen briefly appeared on the World Wrestling Federation program in the summer of 1994 on "WWF Monday Night Raw", capitalizing on Frank Drebin. Nielsen (and George Kennedy) were hired as sleuths to unravel the mystery of the Undertaker, who had disappeared at January's Royal Rumble event. At SummerSlam 1994, in a "Naked Gun" parody, they were hot on the case (in fact, they were standing on a case). Although they did not find the Undertaker, the case had been closed (the literal case had been shut), thus they solved the mystery. In 1990, Nielsen appeared as a Frank Drebin character in advertisements in the United Kingdom for Red Rock Cider.