Looks like you've stumbled upon the secret ninja training area. But don't worry, it's not as secret as you think.
Bob's CSS Ninja Training Program is a top-secret (not really) initiative to push the limits of CSS styling.
You're probably looking for the CSS Ninja Training Manual, but it's hidden deep within the server. Maybe try this link to find it?
Or maybe you'd rather try to sneak into the CSS Ninja Hacking Zone where the real pros train?
Either way, be warned: the ninja masters are watching your every move. Don't say we didn't warn you.