black hat seo url referal trick

One of my frd was telling about url referring black-hat trick wat i guess he was not able to explain me perfectly. As he to was only having idea.

i show you wat he told me.

http://www.americasgreatestbrands.com/volume6/brand-case-studies.php?key=TheNYTimes&label=The%20New%20York%20Times&url=www.sextube.com

ust click on above url and you will see the link of sextube instead of link to the newyorktimes. And google crawl the page.

Anyone can help.