Groucho: I think that if someone starts a story and others can add to it, then, whoever adds to the story makes the twist or the turn. I don't think it is fair to say "This has to be serious" or "This can be silly." The thoughts and ideas of those who participate are what counts and what makes the story original. I would not like to be in your shoes and have to decide "Which way do I want the story to go." This is getting wayyyyyyy complicated. :)