No other operating system can create this awesome effect. Sure, not many people will want to use this fire effect, but this is just one of the many perks of owning a Ubuntu system. This video will show you how to use this fire paint effect via an eye candy plugin that enables you to draw on the screen with animated fire particles. You can also paint water all over your screen. Click here for more information.
You'll need the Advanced Desktop Effects Manager in Ubuntu Feisty (7.04) or Gutsy (7.10). Once you have this, you can enable more advanced effects.
Check out all of the other desktop effects.