I don't see any actual¹ JavaScript on the page, so how would this have been accomplished? Some fancy but broken scrolling manipulation CSS...?

1: The only JS on the page is an IE conditional comment adding an HTML5 shim script, and the Disqus comment embedding script. Then there's the Google analytics that gets pulled in from font references and I guess Facebook JS via the Disqus embed.

I actually become intrigued why anyone would do this on a simple personal site that seemed to at least prioritize minimalism. The amount of junk Disqus loaded is nuts. 109 requests. And, as far as my quick skimming can tell, the only JS on the site is Disqus. So it must be some CSS thing or Disqus that causes this behavior.

What would be the point of doing this?