When you go to hear live classical music, it’s usually quite a formal occasion.
The audience is respectful of the musicians.
Usually people even clap only at certain times. That’s so the beauty of the music isn’t interrupted.
The New York Philharmonic is a very famous classical music orchestra.
So you can imagine what people in the audience were thinking when, right in the middle of the soft and beautiful ending of Mahler’s Symphony No. 9 – someone’s cell phone started ringing.