We're not sure how to categorize that one. "Weird Science Project Gone Too Far", maybe? Or "Alternative Energy" and "Food", to be literal about it. From the website: "I built a potato battery out of 500 pounds of potatoes. It powered a small sound system. With the help of the Red 76 crew I installed the battery and sound system in the back of a U-Haul truck and drove it around town inviting people to enter the truck and take a listen." And a final warning, "Don't eat potatoes after using them for a battery." We'll remember that... ::500 lb Potato Battery, via ::Digg.