From the images evidence, I can seee that the photo is somewhat blurred from a man running, or hopping at a fast pace. Also, the image is an abstract action photo; bringing out the many descriptions in the photo.
The Real Story: The photo was taken by a photographer named Cartier Brensson. He named the image was Derriere La Gare Saint-Lazarare. The photo was posted on time magazines cover. Being named the photo of the centurey.