It is common knowledge. Kids play the choking game, people die from autoerotic asphyxiation, and folks who fly or dive are trained to recognize the symptoms as

It is common knowledge. Kids play the choking game, people die from autoerotic asphyxiation, and folks who fly or dive are trained to recognize the symptoms as well. The burning feeling that you get when your hold your breath is a build up of CO2, not a lack of O2. PDF warning: https://www.faa.gov/pilots/safety/pilotsafetybrochures/media/hypoxia.pdf https://www.faa.gov/pilots/safety/pilotsafetybrochures/media...