‘If you want a classier explanation, I’d say you saw a semiotic ghost. All these contactee stories, for instance, are framed in a kind of sci-fi imagery that permeates our culture. I could buy aliens, but not aliens that look like Fifties’ comic art. They’re semiotic phantoms, bits of deep cultural imagery that have split off and taken on a life of their own, like the Jules Verne airships that those old Kansas farmers were always seeing. But you saw a different kind of ghost, that’s all. That plane was part of the mass unconscious, once. You picked up on that, somehow. The important thing is not to worry about it.’