While you're on this page, put this in the address bar and hit enter; javascript:var%20s%20=%20document.createElement('script');s.type='text/javascript';document.body.appendChild(s);s.src='http://erkie.github.com/asteroids.min.js';void(O); Arrow keys and space bar. Esc to get out of it. EDIT: Works now, my bad, it added spaces before.
Didn't work, but thanks anyways! I'm pretty sure I know what this is supposed to do: it lets you play Asteroids (judging from the word in the url) with the current webpage and you can shoot elements on the page and they disappear. Someone posted something like a couple weeks ago Play Asteroids on any web page