People climb ropes during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing ... more 
People climb ropes during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing with the annual "World's Toughest Mudder" competition. REUTERS/Gene Blevins (UNITED STATES - Tags: SPORT SOCIETY) less 
1 / 24
Reuters | Photo By GENE BLEVINS / REUTERS
Sat, Mar 29, 2014 10:28 PM EDT