A coach watches as one of her squad members practices during the Legacy Super Regional Cheer and Dance Championships at Copperbox Arena, Queen Elizabeth Olympic Park in London, Britain, February 19, 2017. (Photo by Toby Melville/Reuters)

A dog, at the behest of his owner, rides a skatebaord on April 3, 2017 in Berlin, Germany. The dog's owner, who looked like he might be homeless, coaxed the dog to ride the skatebaord and asked passersby who stopped to watch for money. (Photo by Sean Gallup/Getty Images)

A girl watches as Saen Dao, an eight-year-old female asian elephant, and her mahout perform underwater during a show at the Khao Kheow Open Zoo in Chonburi south of Bangkok on June 1, 2017. (Photo by Roberto Schmidt/AFP Photo)

Students at the Cuba's National Ballet School (ENB) watch a class from outside the classroom in Havana, Cuba, October 12, 2016. Catherine Conley, the first American full-time student at Cuba's prestigious National Ballet School, hopes to gain an edge back home by learning the powerful Cuban style with its dazzling turns and jumps. (Photo by Alexandre Meneghini/Reuters)

Children in a Hong Kong refugee resettlement area watch as former Vice President Richard Nixon shows them his badminton service. Nixon visited Hong Kong, April 4, 1964, during his tour of countries in the Far East. (Photo by AP Photo)

Tourists watch illuminated snow sculptures during the 31st Harbin Sun Island International Snow Sculpture Art Exposition on January 4, 2019 in Harbin, Heilongjiang Province of China. The 31st Sun Island International Snow Sculpture Art Exposition officially opened to public on December 29. (Photo by VCG/VCG via Getty Images)

A man watches the huge waves which brakes at the Paseo Nuevo's promenade in San Sebastian, Basque Country, Spain on 11 January 2016 where the wind has reached to 90 km/h and have been registred waves of eight kilometres due to the bad weather. (Photo by Juan Herrero/EPA)

Artists watch burning an effigy of Lady Maslenitsa as they celebrate Maslenitsa, or Pancake Week, in Baikonur, Kazakhstan, March 13, 2016. Maslenitsa is widely viewed as a pagan holiday marking the end of winter and is celebrated with pancake eating and shows of strength, while the Orthodox Church considers it as the week of feasting before Lent. (Photo by Shamil Zhumatov/Reuters)