>>8519761>>8519765Called Erotic Asphyxiation: apparently nearly-blacking out from lack of oxygen at the moment of coming is suppose to feel super good.
https://en.wikipedia.org/wiki/Erotic_asphyxiationYes, a lot of people have accidentally died from it. We don't know exactly how much because it's not uncommon for family members who discover the body to "clean" it up a bit and make it look like an ordinary suicide save from shame of dying doing something really perverted. Most recent and famous one is the guy from Kill Bill who played Bill died doing this. There was some rumors that Robin Williams might have - since his body was found with a rope tied around his neck connected to the door.