This is how you highjack (I dunno if I even wanna call it that) scrolling. The document scrolls normally and the elements are the ones that position themselves and animate. Great job!
Nice scroll effect! It would be more effective and smother transition with just one swipe per content block rather then a continuous scrolling motion.
A for effort, but I really don't care for the scroll effect. I don't like sites that hijack the scrollbar. Parallax-y stuff is fine, but I expect a scroll to be smooth and continuous.
As far as I can tell there is no scroll-jacking here. If you stop scrolling in the middle of an animation the animation stops as well. This scroll is continuous (and smooth for me), it's just the elements become fixed to the center of the screen as they animate so they are traveling with your scroll.
Nice scroll effect! Well executed.
The guys at Humaan did an amazing job. Seriously talented bunch of peeps!