Earlier quoted context omitted.
tl;dr This guy pooped in a 8" hole.
I'm not sure why everyone is down-modding you. Pooping in an 8" hole and climbing to 19,850 feet seems like a pretty good summary of the experience. Edit: I might actually use that as my short summary of the trip.
I've never made it to 20K, infact the highest I've reached is 15k feet being a non-professional climber and it is hard to do justice of the difficulty of every step after 12k. From the difficulty in breathing to not being able to sit for anything more than 30 seconds, it is really a testament to the strength of the climbers who make it to 20k and above like the OP.