After the 9/11 apocalypse happened in New York City, people, particularly New Yorkers, who breathed in the ash, or saw the results of that, have a tendency to keep seeing echoes and having flashbacks to it. ↗
There's that stigma about New Yorkers, how they're so mean, but in my experience it was quite the opposite. People were very genuine and very nice, even on the subway. ↗