A large rainbow forms just before sunset as a fierce storm clears in Ardmore, Pennsylvania, along Amtrak's Keystone line. As if on queue (lol, a nail-biting few minutes), an express SEPTA Silverliner V commuter set makes an appearance, albeit a short one, as it races past the station, headlights glaring, illuminating the way towards the next stop in Paoli, and eventually, Thorndale by nightfall.
