Not sure if anyone has seen or done this before. But here it is. Simply click in an empty space on your Facebook and do the following.
Code:
The Facebook Trick: Press Up, Up, Down, Down, Left, Right, Left, Right, b, a, Enter key, then right click. Then press up then down & magic lens flare circles will appear! The only way to stop it is to log off or reload the page... put this as your status if it worked for you. Also known as the Facebook Konami Code.
P/S : A and B as in the A and B button on your keyboard.
Edit. Another one. Again, if this has been posted before, sorry but I'm just sharing it here anyway. Remember, sharing is caring.
Apparently Facebook employees have a sense of humour: Scroll down to the bottom at the left hand side of the page to where it says ENGLISH and click. It brings up different languages, then click ENGLISH PIRATE or UPSIDE DOWN and see what it does. It is pretty funny.. (I stole this status from someone else, who stole it from someone, who stole it from someone..)