“I want to put a group of characters (perhaps a pair; perhaps even just one) in some sort of predicament and then watch them try to work themselves free. My job isn’t to to help them work their way free, or manipulate them to safety, but to watch what happens and then write it down. The situation comes first. The characters—always flat and unfettered, to begin with—come next. Once these things are fixed in my mind, I begin to narrate. I often have an idea what the outcome may be, but I have never demanded of a set of characters that they do things my way. On the contrary, I want then to do things their way. In some instances, the outcome is what I visualized. In most cases, however, it’s something I never expected.”
On Writing, pages 164-165
P.S. A good example of this is King thought the writer in his novel Misery (played by James Caan in the movie version) would be killed by the crazy pig lady. But the writer had a will to live.
Screenwriting & Slavery to Freedom