This sounds like a browser-related "it's not a bug, it's a feature!" to me. I'm using Firefox and when I scroll, the images keep animating. I'll check Chrome real quick.
EDIT: Chrome can do it just fine too. And I am NOT going to stoop as low as to check Internet Explorer, hehehe. So I'm not sure what's your problem, unless you're using Opera or Safari or (oh the humanity) IE.
EDIT: Chrome can do it just fine too. And I am NOT going to stoop as low as to check Internet Explorer, hehehe. So I'm not sure what's your problem, unless you're using Opera or Safari or (oh the humanity) IE.