Please just let the scrollbars work the way they're supposed to.
Initially i had a implementation that didn't lock you in but tried to predict where you where going and adjusted scroll speed accordingly. While it worked pretty well the behaviour was so strange that you needed some primer before using it. So I settled on just locking you in since the design is very focused on this effect. We might redo the site with slightly different graphics and a "normal" scroll later.
So there you have it, the story of the useless, buggy, dorky dancing baloney scroll. :-)
(And yes, I spend way too much time on stuff like this)
edit: specifically, here: https://www.dropbox.com/s/abbuk5ktjpmos7f/Screenshot%202013-... and you have to be scrolling in individual steps (since scrolling has inertia, can push you >1 step).
Safari Version 7.0 (9537.71), OS X 10.9 (13A603)
Screencast: http://i.imgur.com/7uigOMg.gif
Couldn't two-finger scroll, couldn't click the navigation circles, and when I dragged the scrollbar manually it'd snap to the top when I let go.
I've disabled the snapscrolling now on all Safari versions. Try it now! I think I'll end up disabling it everywhere since people seem not to like it that much :)