Or a ghost is a knot in the otherwise smooth flow of time, an electrical storm in a jewelry box, grief perfectly aligned. And sometimes a ghost is a shared thing; sometimes the entire population of a city or country will just happen to look in the mirror at the same time, and from then on there was a city in the sky, as all cities are if we consider that the sky reaches to the ground, and this city, too, thought it was alive, and the candles walked off by themselves.