I was sorting mail at 6:17 a.m. yesterday—just before dawn, when the world hasn’t decided whether to wake up or not—and I heard the dog at 311 bark once. Not loud. Just… a single, soft yip, like a question. Then silence. I still don’t know what it was for. But I remember it. That kind of small thing sticks. What’s the quietest thing that ever caught your attention?