On instructables we found a guide that tell’s us how to create a plumbers’-crack detector using a LilyPad Arduino controller, a vibrating motor and a photoresistor that will measure how much light is beaming into your butt crack. When the photoresistor comes uncovered, the motor starts to vibrate, letting you know that you’re exposed and people behind you may be looking and/or laughing.

via gizmondo.com