Sweeping, low-angle aerial view. An industrial city. New buildings, Dutch signage, the Erasmus bridge: Rotterdam. Flags of the world dot one side of the river. Old-style Dutch housing encrusted with intricate gabling like so many wedding cakes lines the other. Traffic flows over the bridge: cars, trams, bicycles, pedestrians, and runners. Slow zoom through fanned tension cables. Tight frame on a herd of runners clad in lycra, fluoro, sweatpants, and hoodies. Close-up on legs in motion, running shoes. Track one runner moving in an even-paced lope, stay focused on shoes.