Crazy Mouth plays a brief video of two cartoon mouths on your iPhone or iPod touch’s screen, complete with audio of a goofy laugh or a whistled tune. The idea is to hold the device over your own mouth so people see regular you with a crazy mouth, and hilarity ensues. The full effect really requires an iPhone, since the iPod touch lacks a speaker. Crazy Mouth (Lite) offers only one skin tone, which may or may not match yours.