Getting to the bottom of that noise last night from somewhere over the East River

Last night, we were on a rooftop in the neighborhood enjoying a nice, quiet evening. Then, about 9:30, we heard a series of loud "bangs." My first thought was the ConEd plant on 14th Street had finally blown. But we still had power. The ruckus seemed to be coming from somewhere over the East River, I'd say in the 30s. From what I could gather, someone was setting off explosive pyrotechnic devices, which can be very dangerous. Anyway, the noise continued for nearly 30 minutes, all the while a great variety of sparkling shapes, often variously colored, could be seen through the cloudy skies. We called the police several times, but couldn't get through. Regardless, my guess is that someone was filming a big Hollywood movie. (These people have no consideration for the rest of us who have to live here.) There are many rumored sequels in the works that may be filmed here, such as Cloverfield 2: We Still Can't Afford a Tripod or I Am Legend 2: Still the Legend Despite that Hand Grenade at the End of the First One. Must have been that.

Anyway, I'll continue to investigate this. Here is 30 seconds of the action.