Creating an animated diagram of the drupal hook system.

I have some new insight into the hook system. I've read through Drupal Pro development, watched dozens of videos, and tried sample projects.

My issue the past few days has been how to present these new insights in a way that someone can 'get it' more quickly. I spent months studying the hook system (from the standpoint of a beginner php developer) and while I could make sense of some things the hook system itself evaded me.

What I was thinking of initially was making a Flash presentation, using one of the limited-functionality versions of the software to make an instructional diagram, one that had some basic animation to demonstrate what's going on the in the back end of drupal when a hook is called.

I think it's important to know the correlation. As a beginner php developer thrown at drupal due to necessity, time to gather the understandings behind the massive beast of code wasn't available to me when I needed it.

The question comes down to this: is there something that I can make an animated diagram with that isn't as expensive and convoluted as Flash is?

I'm going to check into open office. I'm not that familiar with Impress. Maybe it has the simple animation features that I'm looking for.