Soccer referee viciously sucker punched by fan

Welcome to Brazil where fans take the game very, very seriously. This fan absolutely blindsided the referee and coldcocked him with a ferocious blow that he put his entire body weight into. Then after the savage sucker punch this coward runs away leaving the referee in severe pain on the ground. What could have this referee done to have deserved this heinous fate? This game looked very intense, but it was played on a dirt field where the spectators had to stand on the sidelines because there was no stands. If Brazilians are getting this amped at some amateur soccer game than the 2014 World Cup is going to be extremely interesting.