Tchaikovsky: 1812 Overture 

Indeed, Maestro Tovey did a fantastic (hilarious) intro that evening in which this video has truncated.

If you read the video description it tells you, but it was Bramwell Tovey

You can't do that to those poor Californian's.....they would think it was a real war or something! It wasn't a hall, it's the Hollywood Bowl.....an outdoor venue....so you know, it's California.... it would be too dangerous to set off artillery! LOL Like I said, it would scare them to death!