Something flashed by the Merlin's canopy, going like a bat out of hell. A well-chosen simile, since it seemed to be a mass of pure liquid fire about the size of a man's head. It was past and gone before I could make out any details, leaving a blue-green streak of afterimage across my visual field. As if my vision had suddenly become attuned, I saw there were many ... things ... flitting and hurtling around the central mass of light. Balls of fire, sheets of heat lightning, unidentifiable shapes moving so fast my mind couldn't make sense of them. They seemed to be orbiting that central light, like chipped-up moths dancing around a porch light. And that, too, seemed to be a well-chosen simile. I couldn't be sure, but neither could I shake the feeling I was seeing a kind of approach-avoidance behavior going on. The things —whatever they were—were both repelled and attracted by the drek going down in the center of the crater.