How To Post Blank Status or Comment On Facebook

It works With both Status and Comments. So here is the trick.. 
1) GoTo Your Profile and type 
2) Type either @[?0:0: ?] or ?alt+0173? (of numpad without questionmark ofcourse) 
3) Press Enter... And That's it..:P Simple, isn't it.. 
Now play around , shock your friends and have fun..