People realise that Zidane has been sent off both for head-butting (whilst playing for Juventus in the Champions League) and in the World Cup Finals (against Saudi Arabia in 1998 for stamping) before, so its evident he has a flashpoint and there's something inside which can be triggered by saying something to him - so it was a surprise, but certainly not a shock. Marco Materazzi is exactly the kind of player who would try and find out what aspect of himself Zidane is so sensitive about and exploit it; if its a weakness, then prey on it. Its not in the best interests of sportsmanship, but if you win the World Cup, nobody's bothered. My only concern is that the butt was only brought to the referee's attention - as has been rumoured since - after the fourth and fifth official saw in on video; if so, they have contravened a FIFA law, and the dismissal is not only incorrect, but also a joke. It should have been a suspension applied after the game if they didn't see it; like Frings and Cufre in the Germany vs. Argentina game.