Third world or green depending on your outlook pile driver click on the link https://drive.google.com/open?id=1DsZ5_rC9lPh2DfR46vhz63lhhyptH-v_
bydamn it works
More like human ingenuity, working with what you have to work with. Add cadence to give a beat to the feet and you get kinetic energy that combined can drive a pile. I say brilliant.
At least they don't sound miserable at their work
Excellent! Love it
If one looks up Gandy Dancer you find similar in the US LONG ago. And some not so long ago Have to respect their ability to work as a Team in a single motion and effort.