I went to see a live concert of The Return of the King, i.e. there was an actual orchestra playing with the movie above them on a screen. I don't think I've been more infuriated during a concert in my entire life. Clearly this was not intended for the classical music crowd so I wasn't expecting the audience to know the etiquette, but that doesn't mean you should be an asshole. For example, this isn't a movie theater. You know how you get up after the film ends because you don't feel like watching the ending credits? Music is playing during that. As in, the orchestra. Do you know how disrespectful it is to leave during the middle of a performance? Particularly when the vocalist is about to make her solo? And seriously, what the hell are you doing? You paid money for the live music, not the movie. Hell, I must've spent only 5% of the time looking at the screen; the rest was eagerly watching the orchestra. If you just wanted to see the actual movie, why not watch it at home instead of spending hundreds of dollars for a ticket to Lincoln Center?