Thanks for highlighting my photo! Some details: Hearing reports about an approaching storm with likely lightning, I saw that I might be able to position myself for a shot. I went to my work to the third floor patio. The large building on the left is Saint Agnes Medical Center in Fresno. Tripod, 20 sec exposures at a time hoping to get lucky. I shot for 40 minutes. Also, this image is the in camera merger of two 20 second exposures, with the merger also done in-camera (Nikon D3).