A competitor scrambles in the mud under barbed wire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. The biannual event to raise cash for charity challenges thousands of international competitors to run through a gruelling set of 21 obstacles including water, fire and tunnels after a lengthy run at the start. (Photo by Christopher Furlong/Getty Images)
WOLVERHAMPTON, ENGLAND - FEBRUARY 01: Competitors scramble in the mud under barbed wire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. The biannual event to raise cash for charity challenges thousands of international competitors to run through a gruelling set of 21 obstacles including water, fire and tunnels after a lengthy run at the start. (Photo by Christopher Furlong/Getty Images)
WOLVERHAMPTON, UNITED KINGDOM - JANUARY 28: Competitors in action during the Tough Guy Challenge 2007 on January 28, 2007, near Wolverhampton, England. (Photo by Paul Gilham/Getty Images)
WOLVERHAMPTON, UNITED KINGDOM - JANUARY 28: A competitor splashes into filthy water after crawling through the 'Tyre Crawl' during the Tough Guy Challenge on January 28, 2007 near Wolverhampton, England. (Photo by Mike Hewitt/Getty Images)
WOLVERHAMPTON, UNITED KINGDOM - FEBRUARY 01: A competitor leaps through fire during the Tough Guy Challenge at South Perton Farm on February 1, 2009 in Wolverhampton, England. (Photo by Mike Hewitt/Getty Images)
WOLVERHAMPTON, UNITED KINGDOM - JANUARY 27: Competitors 'walk the plank' during the Tough Guy Challenge at South Perton Farm on January 27, 2008 near Wolverhampton, England. (Photo by Mike Hewitt/Getty Images)
PERTON, ENGLAND - JANUARY 30: A competitor dressed as a Storm Trooper pushes themselves to the limits as they compete in the 2011 Tough Guy Challenge on January 30, 2011 in Perton, near Wolverhampton, England. Thousands of competitors from around the world come to compete in The Tough Guy Challenge, an eight mile endurance course of mud, freezing water and fire, held on farmland in the village of Perton. (Photo by Dean Mouhtaropoulos/Getty Images)
PERTON, ENGLAND - JANUARY 30: Competitors are pushed down a hill in tyres before the Tough Guy race on January 30, 2011 in Perton, near Wolverhampton, England. Thousands of competitors from around the world come to compete in The Tough Guy Challenge, an eight mile endurance course of mud, freezing water and fire, held on farmland in the village of Perton. (Photo by Michael Regan/Getty Images)
WOLVERHAMPTON, ENGLAND - FEBRUARY 01: A competitor gasps for air after emerging from an underwater obstacle during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. The biannual event to raise cash for charity challenges thousands of international competitors to run through a gruelling set of 21 obstacles including water, fire and tunnels after a lengthy run at the start. (Photo by Christopher Furlong/Getty Images)
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