I can't even watch videos of other people in situations like that without my palms and the soles of my feet sweating like crazy.
Every time he unclipped that carabiner I thought "YOU FOOL!".
What made it worse was the guy following him up. That's my worst nightmate - not being able to turn back because someone (or many people) are following you, and you can only retreat as fast as they retreat.
Actually climbing down from stuff for me is more scary than climbing up, but to be honest if someone put a gun to my head and asked me to do either I would just tell them to shoot.