The narrow streets of the Netherland's largest city are filled with pedestrians -- surging crowds crackling with energy. I wanted to make a picture that would best represent that energy. I put it together as I would a sandwich -- the couple in the left foreground have just come from the nearby Van Gogh Museum and are waiting for a tram that is slowly making its way towards them. The tram appears in the right background -- the curve of its track will carry it right to them. I needed something to happen in the middle zone of my sandwich to provide the "meat" -- something that would capture the eye and make my point about energy. Fortune smiled upon me as a woman pushed a stroller into the space I had reserved just for her, kicking her heel into the air as she sailed through the crowds. The camera stopped this action and recorded what some might call a "decisive moment" -- an instant where everything fell into place to tell a story.