If you want to try something new on facebook then keep on reading this post.
How to write upside down on facebook, twitter, myspace or blog?
There is a website http://www.fliptext.org/ which provide this facility.
Just type your text in the box and in another box below it your text will be appeared flipped.
Here is the link to website-http://www.fliptext.org/
Copy your flipped text and post it wherever you want.