In the language features on Facebook there's an option to turn all the words on Facebook upside down. It's something that only you can see, not your friends, but it's pretty cool to take a look at.
From your Facebook profile click "Settings", then click on the "Language" tab. From the language drop down box choose "English (Upside Down)".
All the words on your Facebook profile will turn upside down. Go on and take a look.