Who are the people who risk their lives to become viral on the internet?

Kirill Vselensky: Kirill Vselensky, 24, is one of the most famous "roofers" - a term in English that refers to roof builders but is also used to refer to the adepts of such dangerous practices - in Moscow. He has already climbed almost all the tall buildings of the city, except, understandably, the Kremlin and the Foreign Office.