This is not a suicide method but just informative on how breathing works.
https://en.m.wikipedia.org/wiki/Freediving_blackout
After breathing very quickly, there is a risk of being unconscious after diving and if not rescued, death will occur without the person knowing anything.
https://en.m.wikipedia.org/wiki/Freediving_blackout
After breathing very quickly, there is a risk of being unconscious after diving and if not rescued, death will occur without the person knowing anything.
