During the night, I slept for a while semi-seated on the couch (a "skill" I inherited from my father).

I had a bit of an idea for my next story, but only that.

But after trying to fall back asleep again in the same position, I didn't quite get there. What did happen, though, was the ending part of the story decided that was the perfect time to announce itself in my brain.

I had to turn the lamp back down, grab a pen and paper and write it down -- the plot points, a few lines of dialogue -- so I'd have it down and not forget it.