A dream of scripting

I keep having this dream where I've written the world's most amazing film script - and it's always a script, never a book or play or anything - and it's the best goddamn idea that anybody has ever had for a movie and it was such an absolute breeze to write because it was so simple and obvious.

And then I wake up in the dark, the idea still in my head and I realise the first thing I will have to do in the morning is write it down, sell it for a bazillion dollars and all my troubles will be over. Then I go back to sleep and forget it completely.

I've had this dream a lot of times, and I never fucking learn to write it down.