On March 8, 1993 Clark received a tryout match for the World Wrestling Federation, wrestling Reno Riggins at a "WWF Superstars" taping in North Charleston, South Carolina as The Nightstalker. He had another tryout match the following night at a "WWF Wrestling Challenge" taping, defeating Ricky Nelson. In May 1993, Clark debuted as Adam Bomb, the newest client of Johnny Polo. Wearing luminous green contact lenses, and sporting a red tongue. Bomb's gimmick was that of a survivor of the infamous Three Mile Island nuclear meltdown accident, which was further emphasized by his ring name being a pun on the "atom bomb". This gimmick was partly realistic; Clark had actually been born and raised in Harrisburg, Pennsylvania, not far from Three Mile Island. Seven months after his debut, Harvey Wippleman replaced Polo as Bomb's manager because Polo wanted to focus on managing WWF Tag Team Champions The Quebecers. The Adam Bomb concept and costume was designed and created by Tom Fleming.