To be honest, that's one of the worst implementations I've seen of that effect. Personally, I'm a fan of it when it's well done. Here's one example:
On any of these how the hell am I supposed to navigate to a specific topic? or link any one to a specific point. The mac one does have tiny dots on the side. I think many people wouldn't even notice them.
The entire scroll hack just seems like a gimmicky, non-intuitive, time consuming alternative to using a slider to forward though a animation/video or some kind of navigation buttons with an animated transition. Or just play a regular movie/animation.