What are UFOs if they're NOT alien spacecraft?

[Lumpy]

Grand Unified Theory of the paranormal?

You know, all the weird things that have been reported: UFOs, the occult, ghosts, government conspiracies, monsters of every size, shape & description, ancient astronauts, etc. Has anyone ever tried to propose a coherent (if that’s possible) explanation for ALL of these things?* Or do the Velikovsy people consider the Bigfoot people to be “those nuts”, and vice-versa? *Beyond the obvious “there are lots of schizos out there”.