First off, you don’t have to have played or even know what Katamari is for this to be awesome. Just think of the giant ball in Indiana Jones instead. Anyway, I found this at Kathack.com strangely entertaining, although completely pointless.
The site instructs you to add a specific Bookmarklet to your toolbar and then click to start to destroy it Katamari (or Indiana Jones boulder) style. The Katamari ball starts small and grows larger with every piece of text or pictures that you smash it through. It’s oddly difficult to explain, so just go and try it!