Referee headbutts Chilean midfielder Jorge Valdivia during Palmeiras v Corinthians [Video]
Everyone enjoys watching players take out referees by mistake.
In this clip the referee gets revenge for all those accidents, unknowingly running into Palmeiras midfielder Jorge Valdivia during the Sao Paulo derby with Corinthians.
The ref headbutts the Chilean star, leaving him flat out on the pitch.
Watch the video below: