There's three possible answers I found. The first one being that they worked in a bike shop, the second is that they were self taught, and the third is that there was this guy named Charlie Taylor who worked for them and he pretty much built the engine of their first planes
The part of the nervous system that is working to calm him back down is the parasympathetic nervous system.
Sometimes we may unknowingly resort to a system of body movements as well as a collection of noises and tone of voice in order to fully convey emotions. Through body movements, facial expressions, g<span>estures, eye movement, touch and the use of space</span> we can express how we feel, are we sad, angry, happy....
