https://ennyman.medium.com/a-lesson-from-29-golden-gate-suic...
Sure most suicide attempts aren’t done this way but I think statistics like this showcase how many suicides are irrational on some level. If it was rational then you’d think they wouldn’t immediately regret it (unless the regret is irrational I guess).
"Nine out of ten people who attempt suicide and survive will not go on to die by suicide at a later date. This has been well-established in the suicidology literature. A literature review (Owens 2002) summarized 90 studies that have followed over time people who have made suicide attempts that resulted in medical care. Approximately 7% (range: 5-11%) of attempters eventually died by suicide, approximately 23% reattempted nonfatally, and 70% had no further attempts."
https://www.hsph.harvard.edu/means-matter/means-matter/survi...
Source: "Where are they now?" by Richard Seiden
There could even be multiple mechanisms there: "turns out being that close to death is really scary," or "my survival means there is a higher power looking out for me," or "my life flashing before my eyes made me realize something about my life"...