"Phantom's Revenge" - Mark Ali

Storm clouds were rolling in as riders enjoyed one final run on "Phantom's Revenge" at Kennywood Park near Pittsburgh, PA. I rendered this in monochrome using Lightroom to highlight the gray clouds and to give the image a bit of an ominous feel.

iPhone 6 (using the 'Camera +' app, captured as a TIFF)
1/4400 sec at f/2.2, ISO 32