This video will show you how to kill a webpage using javascript trick
copy the code paste it to your address bar and hit enter
code:
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(0);
How to use:
use arrow keys to control the direction
use space bar to fire
*This is just for fun, try it yourself