I found this link to a screen saver for the blue screen of death. It is an amazing joke you can play on someone!
http://i-am-bored.com/bored_link.cfm?link_id=20530
I might put some screen shots of it on here later, but how hasn't seen the blue screen of death yet?
What it does, It shows the blue screen of death, then "Restarts" the computer, only to go back to the blue screen of death. If you get it, press escape and you will go back to what ever you had running.
Eric