Participants climb over a wall at the "Tough Mudder" endurance event series in Arnsberg, Germany, Sept. 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles.

Ukraine's Anna Voloshina performs in the synchronized swimming solo free routine preliminaries during the European Swimming Championships in Berlin Aug. 15, 2014.

Players battle for the ball during their match at the swamp soccer tournament in Beijing June 26, 2014. Thirty-two teams from across China participated in the soccer event to celebrate the 2014 World Cup in Brazil.

Cody Yano of Canada plunges into the diving pool during the men's 3m Springboard final at the 2014 Commonwealth Games in Edinburgh, Scotland, July 31, 2014.

Caroline Wozniacki of Denmark hits a return to Naomi Broady of Britain during their women's singles tennis match at the Wimbledon Tennis Championships in London June 25, 2014.

Colombia's Cristian Zapata watches as Ivory Coast's Wilfried Bony goes airborne during a World Cup Group C soccer match at the Brasilia national stadium in Brasilia June 19, 2014.

Juventus' Carlos Tevez, left, celebrates with his teammate Andrea Pirlo after scoring against Torino during their Italian Serie A soccer match at Juventus Stadium in Turin Feb. 23, 2014.

A streaker runs across the pitch as a security guard prepares to tackle him during the Asian Champions League final first-leg soccer match between Australia's Western Sydney Wanderers and Saudi Arabia's Al Hilal at Parramatta Stadium in Sydney Oct. 25, 2014.

Students of Shaolin Tagou Martial Arts School in Nanjing, China, perform during a dress rehearsal for the opening ceremony of the 2014 Nanjing Youth Olympic Games, Aug. 14, 2014. A total of 520 students took part in the performance, "Building the dream."

Japan's Yuzuru Hanyu reacts in the "kiss and cry" area during the Figure Skating Men's Short Program at the Sochi 2014 Winter Olympics, Feb. 13, 2014.

Wingsuit flyer contestants jump off a mountain at China's Tianmen Mountain National Park in Zhangjiajie, Hunan province, Oct. 19, 2014.

Japan's Ken Terauchi competes in the Men's 3m Springboard diving final at the Munhak Park Tae-hwan Aquatics Center during the 17th Asian Games in Incheon, South Korea, Oct. 2, 2014.

A dog surfs at the 6th Annual Surf City surf dog contest in Huntington Beach, California, Sept. 28, 2014.

Germany's Nelli Zhiganshina and Alexander Gazsi compete during the ice dance program at the ISU World Figure Skating Championships in Saitama, Japan, March 28, 2014.