Competitors are pushed to the limits as they compete in the 2009 Tough Guy Challenge on February 1, 2009 in Wolverhampton, England. (Laurence Griffiths/Getty Images)
A racer gasps for air after emerging from an underwater obstacle during the Tough Guy Challenge 2009. (Christopher Furlong/Getty Images)
A competitor scrambles in the mud under barbed wire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009. (Christopher Furlong/Getty Images)
Challengers climb the penultimate hill during the Tough Guy event. (REUTERS/Kieran Doherty)
A man runs through fire during the Tough Guy Challenge at South Perton Farm on February 1, 2009. (Mike Hewitt/Getty Images)
A competitor crawls across ropes during the Tough Guy Challenge on February 1st, 2009. (REUTERS/Kieran Doherty)
An exhausted racer in the mud during the Tough Guy Challenge, Sunday, Feb. 1, 2009. (AP Photo/Simon Dawson)
Competitors leap across burning obstacles in the 2009 Tough Guy Challenge on February 1, 2009 in Wolverhampton, England. (Laurence Griffiths/Getty Images)
A man struggles through the Water Tunnel as others approach from behind during the Tough Guy Challenge at South Perton Farm on February 1, 2009 in Wolverhampton, England. (Mike Hewitt/Getty Images)
A mud-covered challenger reacts during the Tough Guy Challenge, Sunday, Feb. 1, 2009. (AP Photo/Simon Dawson)
An exhausted racer warms himself as snow flies during the the 2009 Tough Guy Challenge on February 1, 2009. (Laurence Griffiths/Getty Images)
After emerging from a ditch, competitors run through fire during the Tough Guy Challenge at South Perton Farm on February 1, 2009 in Wolverhampton, England. (Mike Hewitt/Getty Images)
Tough Guy challengers scramble in the mud under barbed wire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009. (Christopher Furlong/Getty Images)
A competitor runs through fire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. (Christopher Furlong/Getty Images)
Racers make their away across a rope obstacle in the 2009 Tough Guy Challenge on February 1, 2009 in Wolverhampton, England. (Laurence Griffiths/Getty Images)
A man is seen approaching a fire obstacle during the 2009 Tough Guy Challenge on February 1, 2009. (Laurence Griffiths/Getty Images)
Competitors brave water, fire and smoke during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009. (Christopher Furlong/Getty Images)
A challenger emerges from icy water during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009. (Christopher Furlong/Getty Images)
A competitor emerges from muddy water, clearing his airway during the Tough Guy Challenge, at South Perton Farm, near Wolverhampton, central England, Sunday, Feb. 1, 2009. (AP Photo/Simon Dawson)
A man runs through fire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. (Christopher Furlong/Getty Images)
