Update (Jan 10, 2012): Apparently, this only happens when you have logged into your Google Account (such as Gmail, Google+).
What the F*CK is Google doing with their search result?
Apparently, Google muddles the original URL with some sort of a redirection. Instead of giving you a direct link to what you're searching for, Google hijacks your click so that you will visit a Google page. This page then redirects you to the original site.
The problem with this is when you click Back, you are back to that redirection page which then again shoves you to the site. Then you click Back again, and you're redirected to the site again.
Crap, total crap.