Playing for France against England at Euro '92, Basile Boli planted one on Stuart Pearce in retaliation for a foul he believed the left-back had committed.
"He headbutted me because I'd caught the fella I was marking – the winger – and Boli had seen it. It was a reaction to something I'd done," he explained to Four Four Two.
"So I’ve gone down, maybe out of shock. It definitely wasn’t the blow that put me to the floor.
But as the referee hadn't spotted the headbutt, Pearce thought there was no point lying on the floor and got up.
"The first question I was asked in the press conference was: 'Were you headbutted?' and I said, 'No, it was an innocent clash of heads,' because common sense told me that if I’d said it was deliberate, then the first thing they would have done was dig out all the footage of me over the years and I’d be crucified."