This turned out to possibly be my favorite session! Ana is stretched out and tied spread eagle on the bed. She wants to see how long she can go with the inflatable ***** collar severely restricting her breathing. The collar is put around her neck and the inflator bulb is squeezed twice. Every minute after it gets squeezed again until she is almost completely unable to breathe. I of course make it a little harder on her by periodically covering her mouth with my hand. She ends up going out completely in this one!