I think that only those who've managed to succeed in this method can truly answer the question but anyway I personally just don't believe that one can force themselves to go through with it, I imagine that those who succeeded in jumping were very desperate and determined as that method really does sound terrifying and it's like the survival instinct just exists to prolong suffering, I really wish that it's easier to leave this world.
But anyway best wishes, I hope you eventually find what you search for.