One photograph I've received taken during the tech of the vocal faculty scenes at the Royal Academy of Music last month. The only memento of a great experience and pretty moving finale.
Live performance is in its nature a one-off, momentary, event. Unlike most other art forms it exists in the present, lost forever and consigned to memory. Having this photograph spurs my memory of the unique event, its singers, emotions. However without proper photographs, for the rest of the world it is as if the performance never happened.
I could describe in words, with lots of emotions, what actually happened right at that moment at the very end of the scenes, after Hansel and Gretel had fallen asleep and the audience thought they'd seen the end of the performance. Then in the amazing angel music that follows the prayer, everyone else on stage who had been lying asleep til then, about 35 in total, stood up and lit the torches on their phones, and the stage filled with stars looking down on the children asleep.
But it would never be quite the same as having been there...