I was asleep.
I was drifting and dreaming, sometimes remembering a bit. And by remembering that bit, it changed me to the point of chasing to expand on what I remembered. Like an up-and-coming addict going through the early stages.
What early stages? Of the person becoming addicted by starting to crave for more of that feeling in his body and in his mind, after taking the first hits of his drug of choice. Stop interrupting me.
When I would dream something really interesting and I'd remember it and keep refreshing myself with that memory, it would always feel like there could be more to it than what I managed to remember. Even more of what I actually dreamt, more of that world and situation.
I came back to that explanation about the early stages and expanded on it a little bit. Now it's perfectly clear, so stop bothering me about it.
So I'd start with setting things up, to map that dream into something like a story or a script. And obviously...