interesting for me that's really jumpy, it looks like each frame is 120px high? so something like this is much smoother at the beginning for me:
var step = function() { $("#container").css({top: (parseInt($("#container").css("top"))-115)+'px'}); window.webkitRequestAnimationFrame(step); }; step();
but in the middle where it zooms into the people in the car, it get's out of sync...Or you can click one of the links at the top to auto-scroll to a section.
run:
in your console (f12 in chrome/firebug, crtl+shift+k in firefox)