Use of Print Screen for some Fun

You know the use of Print screen button on the keyboard.
It captures the screen , right ?
But now I will tell you how to use it for some fun .
Take screen shot of the desktop by pressing Print Screen on the desktop .
Go to Paint and paste this . Save it .
For Windows XP users
1. On the desktop right click ----->; arrange icons by ---->; De-select 'Show Desktop Icons '.
2. Now right click the task bar and select properties .
3. Check auto hide the task bar. Click OK.
4. Now change your wallpaper and keep the one you saved earlier.
5. If paint is not closed, select File ---------> 'Set as background (Centered) '.
Now on the desktop even if you click any icon nothing will happen !!!
Now do I need to tell you how you can use it for fun on someone Else's PC ?
To revert back to normally change the wallpaper and select 'show desktop icons' on the right click menu .