Traveling around Tokyo by train is quite simply astonishing. The sheer volume of commuters within a station at any given time is terrifying at first glance, but as soon as you witness the frequency of trains and general efficiency of the station, you'll be quickly hopping from station to station with ease. This efficiency has recently expanded toward environmental and cost cutting issues with regard to power. A successful trial at Tokyo's busy Shibuya station has proven the power generating ability of real live people. By using special pressure pads at the ticket gates, electricity is generated by the vibration of commuters trampling through the gates. While not linked into the powering of the station yet, the gates light a lamp on the gate showing that power has been generated.

Via Pink Tentacle