You ever be trying to go to sleep and your brain hits you with the best worldbuilding ideas ever, and you know you can't start writing things down cause you have to be responsible and get to sleep.
Like I was about to go to sleep and I had some idea about the 'mournful gods who cut down their perfect sibling out of envy, and the body of this being became the world, and the god closest to them forever watches over them as the sky'.
The kind of stuff you come up with when you're just about to fall asleep but it gets lost and muddled, traded away for dreams.