Create a folder without name

A very simple trick to fool your friends.
Create any folder on the desktop.Go to 'rename' option by right clicking the folder.Press the 'alter' key and while pressing the 'alter' key, press 255 from 'Numpad'.Remember,255 must be pressed from 'numpad'.
NOTE: This trick may not work on LAPTOPS, since laptops don't have numpad.