Turn your site into the game of Asteroids. Click to start and you can destroy the contents of your webpage by flying around and shooting them. Check out Electric Tree House (http://electrictreehouse.com/) (bottom of the right sidebar) to try it out yourself. The plugin is also highly customizable allowing you to add a description and/or image as well as controlling which pages the Asteroids widget appears on. Give it a try and I guarantee you will be impressed. The Widget implements a javascript by Erik Rothoff Andersson (http://erkie.github.com/), based on the classic game, Asteroids.
This plugin is available for download to be used on your WordPress self-hosted installation.