Soccer player receives a yellow card, KO's referee with vicious left hook

Occasionally frustrations boil over in the heat of play, and usually it ends in blowing off some steam by throwing water bottles or turning your aggression on the field up a notch.

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That wasn't the case for this Argentine soccer player who appeared fed up with the referee.

After receiving a yellow card, the player cocks back and slams the ref with a vicious left hook that puts the offical out cold.

That's not gamesmanship, and this guy might not be welcome back to the pitch.