During a performance of Swan Lake, “The curtain came down. The orchestra stopped. The house lights came up. There was no announcement. Most people were on their feet, and many started heading for the doors. We debated what to do. We scanned the crowds below, trying to make sense of what we were seeing. In the balcony, we were acutely aware of how high up our seats were and how many people were in the building. Our hearts were pounding. We did not see a threat, but people were reacting as though something were very wrong.”