Looks like an angel (or was it a butterfly?), spreading the wings!
This image was captured with an ultra wide angle lens at. 11mm focal length on a FF camera. The angle of view of this lens is enormous, showing that the light show was huge!
Sony ILCE-7S,Canon 11-24mmL f/4.0 10s f/5.6 at 11.0mm iso3200
full exif