While at the gym, I came up with an idea for a sci-fi novel. It's about a man whose life isn't working out for him. He lives a highly compartmentalized existence but still is only barely coping. Then the aliens come and fracture his life, shunting each of his compartmentalized existences into its own time stream. So now instead of living one life with lots of failing parts, he's now living every part as a separate life...and they are all still individually going wrong. The only thing is, our protagonist is, in every existence, the only one aware of this multifaceted reality...and of the aliens.
You can gather two things from this synopsis: what kind of mood I'm in and what working out does to my brain.