How to make a little pony power.

https://www.youtube.com/watch?v=m3KdpzL3Hkk

Not for someone with shakey hands.

That is crazy. Pop's had a chain saw shop at one time. I never liked working on saws because of all the small parts. I'd go crazy mess with those really small parts. The guy has good hands for sure.

Pretty cool though.

Very interesting, this guy's good.... but being that it is powered by an outside source (compressed air), instead of an internal reaction (combustion), it is technically a motor not an engine. And it is a 2 stroke- any engine (motor) the cam turns the same speed as the crank, it is a 2 stroke (the cam and crank gears are the same size). But fascinating any way you slice it.