After Lionel Messi scored a wonderful third goal to complete his 51st career hat-trick, Real Betis supporters did what only true fans can do when in the presence of a football genius.
They stood up, applauded Messi and joined with Barcelona fans in chanting his name.
No, the game wasn't at Camp Nou. It was the Benito Villamarin Stadium in Seville that resounded with "Messi! Messi! Messi!"
It may end up as simply another superb performance by Messi, among so many in his trophy-laden career. But this game will be remembered by the 54,000 mostly Betis spectators who turned up yesterday to back their team, only to end up honouring the man who helped deal them a 4-1 defeat.
Messi said he had never received such a tribute from opposing fans.