Don't panic! A little after 10 a.m. Battery Park City residents got a touch worried when they heard what sounded like an explosion. Multiple people called 911 in concern. But while there was a loud noise this morning, it wasn't anything to worry about: The explosion was actually a cannon being fired as part of the Castle Clinton bicentennial celebration!

And that's isn't the end of the Castle Clinton celebrations going on today:

Throughout the day there will also be opportunities to hear period music, take tours of Castle Clinton National Monument and to talk with costumed re-enactors about what life was like for an American soldier manning what was then the Southwest Battery and what a Red Coat soldier thought about the defenses that New York built to keep the British from ever invading the city again. Children can earn a Junior Ranger Badge by learning what it took to be a soldier and then taking part in a practice drill.

So, if you aren't interested in any Black Friday deals on this lovely November day, perhaps you might want to head down to Castle Clinton? There is more info on the day's festivities right here.