(Video Link)
Arturo Vidich, Eric Mika, and Tai Yin Ho equipped pressure sensors to the soles of a set of shoes. They can be played like a musical instrument by dancing in different ways. The project is called "Beat Feat". You can view schematics and construction photos at the link.
http://www.beat-feet.net/project/fabrication-documentation/ via Make
http://tinyurl.com/y8pckra