Don’t be alarmed! That fireball filling the sky tonight was just a planned explosion during filming of HBO’s ‘Boardwalk Empire’.

Here’s an amazing aerial shot from NBC New York’s helicopter as it hovered over the ‘Boardwalk Empire’ set:

And another video from the ground near the set:

Video of tonight’s fireball via Mindy LaVergne on Twitter

Did you get any photos or video of the explosion? Send them in! Drop a link in the comments below or mention @agreatbigcity on Twitter or Instagram.