Nine years ago I awoke from a dream, which I promptly wrote down. Though I eventually lost the original slip of paper I wrote on, the story is firmly ensconced in my memory as it has gone through many many changes before becoming the screenplay I just reread a few hours ago.
It needs work. Seems I added too many tangents.
Another dream a few months after that one is too weird to even film, which means it would probably be a cult-classic. It was a mish-mash of different dreams I had over the years and some political things and my spending, back in those days, many hours a week on NYTimes crosswords.
That script took years to write, and I'm utterly amazed I even wrote it.
Whole bunches of other things I saw before waking -- all in full color and other senses -- I either wrote out or mumbled out loud so I wouldn't forget.