Thanks for sharing this! I love examples of capturing the myriad forms of free, "waste" energy.<p>Another oldie: a nightclub that uses the kinetic energy of dancers' feet to generate electricity.<p><a href="http://www.dailymail.co.uk/sciencetech/article-1027362/Britains-eco-nightclub-powered-pounding-feet-opens-doors.html" rel="nofollow">http://www.dailymail.co.uk/sciencetech/article-1027362/Brita...</a>