Part of dying is, believe it or not, your brain dying along with the rest of your organs… some methods immediately begin to kill your brain by starving it of oxygen (exit bag, hanging, carbon monoxide, etc). SN has the odd trait of not targeting your brain immediately. Your body knows how to compensate for it for awhile. You pass out from the low blood pressure. While you're unconscious, your oxygen-deprived organs eventually can no longer compensate to protect your brain, and your brain eventually enters the "get damaged then die" zone. Seems from the many articles I've read that this is one of the later stages. Medics have attempted to treat and save SN poisoning attempts but not succeeded when enough time has passed since ingestion. Seems like the window for survival is relatively soon after ingestion, assuming proper treatment. Do more research and realize how fear-mongering you're being through your lack of education on the topic. Do your research on Google with reputable sources like pubMed, not from the stories posted here.