Zidane had two great headers in the second part of the World Cup final, the first was a bit close to the goalie, but the second was right on target. Where I come from we call this a Glasgow kiss, though actually Zidane's was a bit timid for a native of Glasgow, where anything less than a nose in three little pieces is pretty much kid’s play.
Thanks to Martin for headline and the BBC for the pic.
Postscript: Zidane has now commented on the incident through his agent: ""[Zidane] told me Materazzi said something very serious to him but he wouldn't tell me what," agent Alain Migliaccio told BBC Five Live Sport." Hmmm. If it was that serious, e.g., a racist comment as some have claimed despite no evidence to support this, you'd think Zidane would be a bit more specific wouldn't you?