This was a fortunate accident. While testing my strobes on Steam Into History's brand new 1860s 4-4-0, York, my front strobe didn't fire. The result left a neatly side lit scene with an interesting shadow. I did get all the strobes working, but I wound up liking this shot more than the "properly" lit ones. More on Steam Into History at http://blog.railroadphotographer.com/2013/11/lincoln-steams-into-history.html