Once I tried pulling rickshaw, although it was of modified version but I tell you it was not cake walk.
This would have been reason behind regular modification of Rickshaws, be it change in model, frame or addition of external power sources like battery.
But here is whole new idea, you can say introduction of Rocket Science in Rickshaw.
Till now whenever we hear about of “thrust” either its Airplane or Rocket, because its thrust that makes the Airplane or Rocket go in air.

Wind-human hybrid Rickshaw,Courtesy: Ecofriend
But now days its helping Shiro Hosojima(name) peddling his wind-human hybrid Rickshaw smoothly on the roads of khatmandu, Nepal.
So how did it happen : Hosojima commissioned a professor in a neighbouring town to design and build a windmill for his rickshaw. How it really works is, the windmill is connected to the rear wheels with a side-mounted gear. The drum’s rotation helps in acceleration, making it easier for the pedicab driver to pedal.
ज़बरदस्त!