There was a surprise in store at the end of tonight's Simon Bolivar Symphony Orchestra concert at the Royal Festival Hall.
As Gustavo Dudamel returned to the stage to take yet another round of applause, he was accompanied by a statuesque figure in a horned helmet and eyepatch with a dead sheep slung around his neck.
Their mambo days now apparently behind them, the no-longer-youth orchestra encored with Abendlich strahlt der Sonne Auge from Das Rheingold - the sheepskin-draped figure revealed as Bryn Terfel.
I can report that he's loud enough to drown out what looked like 140 musicians. And he knows all the words. All good news of course for those of us lucky enough to have tickets for autumn's Ring cycles at Covent Garden.