Second placed Zhang Guowei of China gestures as he celebrates after winning silver in the men's high jump final during the 15th IAAF World Championships at the National Stadium in Beijing, China, August 30, 2015. (Photo by Dylan Martinez/Reuters)

Ukraine's Hanna Antonova competes during the 2015 World Pole Dance Championships held in Beijing, Sunday, April 12, 2015. (Photo by Ng Han Guan/AP Photo)

Natasha Hastings of U.S. on the starting block before the women's 400 metres heats during the 15th IAAF World Championships at the National Stadium in Beijing, China August 24, 2015. (Photo by Lucy Nicholson/Reuters)

Giant pumpkins sit in the bed of a truck before the 40th Annual Safeway World Championship Pumpkin Weigh-Off on October 14, 2013 in Half Moon Bay, California. Gary Miller of Napa, California won the 40th Annual Safeway World Championship Pumpkin Weigh-Offgigantic pumpkin with a gigantic pumpkin that weighed in at 1,985 pounds. Miller took home a cash prize of $11,910, or $6.00 a pound. (Photo by Justin Sullivan/AFP Photo)

Max Niedermaier of Germany collides with uncontrolled motorcycle of Niclas Svensson of Sweden during Astana Expo FIM Ice Speedway Gladiators World Championship at the Medeo rink in Almaty, Kazakhstan, February 18, 2017. (Photo by Shamil Zhumatov/Reuters)

Competitors take part in the Red Bull Crashed Ice Cross Downhill World Championship in Marseille, France, January 14, 2017. (Photo by Jean-Paul Pelissier/Reuters)

Drivers take part in a demolition derby organised by the Malta Motor Sports Association to raise funds for charity in Ta' Qali, outside Valletta, Malta, January 8, 2017. (Photo by Darrin Zammit Lupi/Reuters)

North Koreans wave flower bouquets and balloons as they march during a parade at the Kim Il Sung Square on Tuesday, May 10, 2016, in Pyongyang, North Korea. (Photo by Wong Maye-E/AP Photo)