Pixar developed a tool that came to be called the Story Spine. It's a simple guide that more reminds us of how we (re)experience the world every day than tells us how to tell a story. The re-experience will sound odd - I promise you, it's spot on - that how a day went is not exactly how it went when it's reimagined in its retelling. I'll say more as we move through this but they've simplified an extremely complex and specialized process of translation going on in our brains that, even if experience doesn't exactly correlate the makings a story, our brains reorganize it that way because that what it does. If you don't beleive me, try this experiment. When you go to relate you day tonight to someone what happened during your day, are you recounting it as it happened or do you find yourself telling it with details that don't exactly match the experience? There are other guides writers, filmmakers swear by in putting their works together but Pixar's is the one you can count on to leave room for hanging details on that feel a bit more natural. I'd quite remiss to relate it with you in it's literal terms because, well, it's not a literalist exercise. More useful I think is to use the Story Spine to relate to you the Story Spine as a story in itself. Click this link to see the Story Spine information as a story itself.
Use the pathway animation with story elements as user scrolls - use other examples: Neuroptika, Cerevance and write as a case study on each noting the evolution of psynthesys work as well as pointing out the work of the times. Note also the tools come to bear in authoring and development. This may also be a good place to drop in the cat story. Idea here is to give ideas on what story is capable of and generally get people thinking about their own story.