I was about to post this presentation yesterday when I got distracted by the embedded slide show. Okay, I admit that I was playing with it. Try it, and you'll understand why.
The slide show is hosted on Prezi. If you're not familiar with it, it's a really neat presentation tool similar to Slideshare (only more sophisticated). I don't know all the features, but luckily I have a presentation that can demonstrate them.
This is the first time I've heard of Prezi, so I'm still learning about it myself. I find it fascinating. It's not every day I find a new way to organize and display content.
I want you to click through a few frames on this presentation, and then use your scroll wheel to zoom out. You should be able to figure it out from there; a lot of the behavior is similar to (for example) Google Maps.