Photo date: March 28, 2017. Photographer: Mark Mahin.
In the top of the first photo below, we see a strange triangular luminosity that made a fleeting appearance at Grand Central Terminal in New York. The photo to the right shows the same area a few seconds later. We can seem to see three orbs within the triangular luminosity, or possibly they are position states of a single orb moving about in some burst of motion.