Competitors dressed in a gorilla outfits prepare ahead of the Great Gorilla Run on September 24, 2011 in London, England. Hundreds of people dressed in gorrilla suits participated in the 7 km run around the City of London which is hoped will raise £400,000 GBP, anabling funding for projects dedicated to the protection and preservation of Gorillas. (Photo by Dan Kitwood/Getty Images)

Participants compete during the Strong Race event near Tukums, Latvia, May 3, 2015. More than 4,000 people participated in this 9 km endurance race with 33 different obstacles. (Photo by Ints Kalnins/Reuters)

In Weronika Gęsicka’s unsettling images, American archive photography gets distorted into scenes that are both nightmarish yet somehow entirely plausible. Gęsicka is a guest artist at the Circulations festival for young European photographers, Paris, until 5 March. Here: “Untitled #5”. (Photo by Weronika Gęsicka/The Guardian)

An adult helps a young girl light a cigarette as a band plays in the background in the village of Vale de Salgueiro, northern Portugal, during the local Kings' Feast Friday, January 5, 2018. The village's Epiphany celebrations, called Kings' Feast, feature a tradition that each year causes an outcry among outsiders: parents encourage their children, some as young as 5, to smoke cigarettes. (Photo by Armando Franca/AP Photo)

Flashmob: Water Battle on All-Russian Exhibition Center in Moscow, Russia, on August 5, 2012. (Photo by Lilja Dal)

A jogger runs on the bank of Donaukanal channel in central Vienna, Austria, September 5, 2016. (Photo by Heinz-Peter Bader/Reuters)

Children react as they celebrate Guy Fawkes day in Soweto, South Africa, on November 5, 2014. (Photo by Siphiwe Sibeko/Reuters)

A man pulls a cart with collapsed cardboard boxes past boutiques in the Sinchon district in Seoul, May 5, 2015. (Photo by Thomas Peter/Reuters)