Jamie Merrill a fashion writer at Independent UK wrote a cute but feasible idea to harness power using the motion of bouncing breast. Charging the iPod is one of the application.

I got a kick reading it and I read it twice so I wasn’t left out on the details, haha. But you should really read it. From a scientific point of view, hey it might work. What’s next, human-power motion dick to charge my iPhone?

via source