Magical moments in live concerts?

We all lovers of good music have had more than one, but some are more special than others, I was listening to Elgar's Cello Concert performed by Dupre and made me think of this concert I went to, the cellist Lynn Harrell who now owns Dupre's cello, played Elgar's Concert...my mind blew up right away when I heard the same instrument alive!!!! It was an amazing and magical moment. I have some others too, but I would like to know yours.