Whoops forgot to introduce it. Click (or hit spacebar) to see a random GIF fullscreen, keep clicking for more. You can directly link to any of the GIFs. These are all added by users, you add your own by simply dropping in a GIF URL on the homepage.
Oh, right, when I launched it I just saw a background of random squares that changed a bit every time, and I didn't have any gif to try it out with, so I closed it.