So for all those science nerds out there that also skate board and or surf board, and others that just like cool stuff, here is an interesting video on the science of pumping on a skate board. How to generate net forward motion on a flat horizontal (no slope) with a skate board, no motor, no pushing off with your foot, just by shifting your weight and travelling in a S shape— this is commonly called pumping on a skate board. I have looked at a lot of instructional videos about pumping and never had any real sucess with them. My son Zac is a natural and can do it well. Then I found by chance th