Okay, so that's not a riddle. The characters in a flash story don't have much time to interact, but interact they must if we are to care about them. Flash fictions don't explain things to us, they suggest; they offer up some little gifts for us to arrange in our minds and explore. Usually, they comment on the human condition, or nature, a philosophical, political, or personal issue. Often, the story will start one place and end at another delightfully surprising, connected, yet creative place. Ultimately, the reader must make what I call "little leaps of inference" at the end. The concluding sentence leaves open some possibilities, ironies, and/or a particular emotion. Open is the key word. As a reader, I want to feel awe, and that the ending wasn't obvious. As a reader, I want something that lingers: a story I might keep thinking about, turning it over and over, perhaps even finding new meanings in it. The ending is a door that leads outward. A joke ha...