Id say us humans would only risk jumping from a height if we knew it would be pain free landing.... anybody that seriously thought about doing so not taking into account the PAIN is crazy even those that overcome fear of falling or jumping from high up still consider there own self being....
Suicidal thoughts are a foot here I'd say either that for Drugs or Booze
When I did my bungee jump I saw 3 people after me who had paid 50 euros but then could not jump because of fear. They had 3 chances then had to come down, losing their 50 euros
Ive also feen people at festivals hanging off rigging thats probably 100feet high. The music was cut off during Global gathering 2007 when Paul Van Dyke was playing his set for this reason. People were throwing bottles and other stuff up at him to try and know him down so the music could continue. Needless to say when the fool got down he got a royal storming from the crowd below!