Google Chrome may have come out of Pwn2Own unscathed, but you can rip through any website it (or another HTML5-compliant browser) displays -- just pull out your handy Katamari Damacy ball and wreak havok on the page. Na NAaaa, na na na na na na na, na na na na na naaaa...

Alternatively, paste the following Javascript into a bookmark, and then click it when you're tiring of a page.
javascript: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);