Try this

http://www.forumwarz.com/discussions/view/9164-how-to-stop-a-web-server-by-evil-trout

1) Take a database table with over a million rows

2) Add 9 new columns to it with default values and make them all NOT NULL

3) Do this while many users are playing

4) Panic when it takes over 10 minutes to add one column

5) Take down the web server to leave the database migration to run by itself6) Be embarbumed.The end!