The veteran Italian headbutted Jordan as tempers flared at full-time in Milan 1-0 Champions League .

BBC: Gennaro Gattuso given four-match ban for headbutt

The exchange had still seemed innocent enough until Zidane inexplicably headbutted the Italian defender in the chest.

CNN: Zidane sees red as Italy win Cup

In 1991 he received a two-year conditional discharge for assault occasioning actual bodily harm after he headbutted a colleague.

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Both were drunk and started arguing, and Mills claimed her boyfriend headbutted her.

BBC: Michelle Mills

During the brawl in the Strangers' Bar, Mr Joyce headbutted Tory MP Stuart Andrew and attacked three other politicians.

BBC: MP Eric Joyce banned from Commons drinking

Lennon, who was surrounded by his own security guards and EDL stewards, then stepped forward and headbutted Mr McKee.

BBC: EDL leader Stephen Lennon convicted of assault

Midfielder Gattuso headbutted Jordan following his side's 1-0 defeat in the first leg of their last-16 encounter at the San Siro and has since apologised.

BBC: Gennaro Gattuso given four-match ban for headbutt

Peter Hart, 39, was headbutted and punched in front of his wife and 16-month-old son as he was leaving music festival Guilfest on 13 July.

BBC: Motorists quizzed in Guildford after assault on father

Mr Phillips told the jury it would hear eye-witness evidence that Ms Smedley was punched and headbutted by Mr Rigby in the course of their relationship.

BBC: Rio Smedley 'murdered by mother's boyfriend'