by Michael David SmithFiled under: MMA Videos, UFCThe referee Big John McCarthy once described Randy Couture as the most mentally impressive athlete in the history of MMA. The way Couture talks about his preparation for his UFC 105 fight with Brandon Vera explains why Couture has always excelled at the mental aspect of the sport.UFC 105 Video: Randy Couture on 'Solving the Problem, Solving the Puzzle' originally appeared on Fanhouse MMA Blog on Tue, 03 Nov 2009 13:58:00 EST . Please s...