Not only is Ryan Petrich a top tier iPhone developer, but he’s got a sense of humor as well.

His latest tweak, entitled UpsideDown, is proof of that. Just as its name states, UpsideDown will make most of the apps on the iPhone orient themselves upside down, making for a great prank idea for your friends and family…

The only downside to UpsideDown is that the victim’s device must be jailbroken. Chances are if a person is wise enough to jailbreak, they’ll immediate recognize your tomfoolery; though, I guess it doesn’t hurt to try.

UpsideDown is a free download available on Ryan Petrich’s beta repo:

What do you think?