1 of 12Image
This is hands-down one of the easiest, most mind-boggling pranks to pull on almost anyone. As such -- and because I'm going to reference it for a later prank or two on the list -- this is where we begin our journey. There are two ways you can make this happen:
Method 1: This is the fastest way to do this trick, but sadly, it doesn't work on all computers. All you do is press CTRL, ALT, and the down arrow. That's it! To reverse the effect, simply press CTRL, ALT, and the up arrow.
Method 2: Right-click on the desktop, select "Screen resolution," then, in the dropbox next to the "Orientation" label, select "Landscape (flipped)."
The result of this alone is usually enough to thoroughly confuse your victim, so give it a whirl soon and see what kind of reactions you get!
[Related Gallery: 20 of the coolest gadgets and must-haves for your office!]