in the sport of wrestling, coaches may challenge a referee's call by throwing a "soft object" into the ring. this is normally a foam brick, but wrestling rules do not exactly say what the soft object must be. the rio 2016 organizers gave wrestling coaches soft plush dolls of vinicius to throw into the ring when they wished to challenge a call. one wrestler's coach got a vinicius doll with a red shirt, while the opponent's coach got one with a blue shirt.