BON JOVI WAS SUPPOSED TO CLOSE THE NIGHT—UNTIL PAUL McCARTNEY WALKED ONSTAGE AND CHANGED WHAT EVERYONE WOULD REMEMBER. Thousands came expecting a legendary rock concert, but they left talking about a surprise no one saw coming. The moment the former Beatle appeared beside Bon Jovi, the arena erupted into a standing ovation that lasted longer than anyone expected.

The final act of the evening belonged to Bon Jovi. The lights dimmed, thousands of fans rose to their feet, and the familiar roar of anticipation rolled through the arena. It was supposed to be the perfect ending to an unforgettable night of rock music. No one expected anything more. Then the stage lights shifted. […]