Katamari Damacy in your browser! I made one twice the diameter of my browser window.

Paste this into your address bar and take out the space between the java and script:

java script:var i,s,ss=['http://kathack.com/js/kh.js','http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js'];for(i=0;i!=ss.length;i++){s=document.createElement('script');s.src=ss[i];document.body.appendChild(s);}void(0);

Courtesy of KatHack.

edit: A fun page to test it out on is meomi.com