I guess since you see none of those things I see in this story we have no common ground to discuss this.
If you have been there why would you mock it? I know many people who Doctors have told them that they would die and yet their will and faith were strong enough to get them through and they recovered, but then I doubt our views on faith and strenght of will are again two more things we do not share.
You are hearing my caution as mocking ....you are wrong ...again, baby steps are prudent
think of it this way....take a non athletic person of normal weight....and have them run marathon with no experience carrying 2 / 50 sacks of corn...the potential for joint failure alone should make anyone think twice....slow and steady wins the obesity race.....been there myself