UFC star Polyana Viana used her fighting skills to see off a would-be mugger in Rio de Janeiro. Viana left her attacker a bloodied mess after he tried to steal her mobile phone, claiming he had a gun. "He was really close to me. So I thought, 'If it's a gun, he won't have time to draw it.' So I stood up. I threw two punches and a kick. He fell, then I caught him in a rear-naked choke. Then I sat him down in the same place we were before and said, 'Now we'll wait for the police'."