Give yourself the Hymnic Manouevre - words of experience

When you choke you wont be prepared with lungs full of air like you would if you were preparing to dive under water. 

I beat with my fist around where my lungs sit behind my rib cage - nothing - *losing air and I see the end is approaching*. I recalled the anatomy of the animals I had butchered, I knew about the location of the diaphragm, a  sheet flat muscle that separates the intestine, liver, spleen, and kidneys from the lungs and heart - both exclusively protected by the rib cage. I struck again just under where my rib cage ended and my unprotected intestine sit. Strike upward to put the pressure on your the protected lungs. The piece shot out.