Do the Harlem Shake!
If you look at the bottom of your screen, (not scrolling down, just looking at what's at the bottom,) You'll see that it says next to "Shortcuts", it says "Do The Harlem Shake". Click on it to see what happens, from there, it's pretty self-explanatory! XD
Message Walk Greeting!
If you click on your profile, then go to your message wall, there should be a little button that says, "Edit Greeting". You can add whatever you want so people will see it when they leave a message, and it will look something like this, when you go to leave someone a message.