I think it's because the thought of there only being grass on the ground and not something like concrete, makes me not do it, I have seen people survive high heights before, obviously with serious injury's and I don't want to be paralyzed, now I know hot air balloons can go a couple thousand feet above ground, I was just scared of surviving somehow, I mean, I never really researched suicide methods in that year, SI is a bitch which contributed to me not jumping off.