Bobby Heenan
Billy Jack Haynes and Hercules' feud started when Bobby Heenan continuously taunted Haynes, telling him that Hercules was the real master of Haynes' finishing move, the full nelson; which came to a boiling point when Hercules attacked Haynes on an edition of "Superstars of Wrestling", which led to their match at WrestleMania. This battle was advertised as the "Full Nelson Challenge."