I actually have a page of notes kind of like this as well, although mine are definitely for a story I never got around to writing about Zebulon as an agent of the Faire Queen in the mythlands. There's some really interesting ideas in there, and then there's some stuff that makes no sense to me any longer, as I've forgotten most of what I was thinking at the time I typed it out.

Every now and then I come across a hand-written page of notes like that, and they seriously seem like the ravings of a madman. Totally disconnected lines, plot ideas, and punchlines without the set-up having been written down. "Zebulon-- "That's why I never trusted ducks!" That kind of thing.

Sometimes I worry myself.