Mirko Filipovic is about as intimidating an opponent as you can get. Known as Cro Cop, which is short for 'Croatian cop' due to his time as a part of the Croatian police's elite special forces unit, Filipovic is one of the most devastating strikers the fight world has ever seen. Filipovic's signature move was a leg kick straight to the head, and any opponent unfortunate enough to get caught by one of those crushing hits can quickly say good night.