That's really something!
Helps to be ambidextrous.
I'm surprised and I suppose impressed that she wasn't belayed all the way up, but I could see that the lifeline would get in the way.
Even if you fell on the little safety link going over the top, you'd fall about ten feet headfirst until that carabiner caught something solid, when you'd slam face first into one of those solid foot boards.
Thanks Capn. That's a good drive-by of a lot of interesting details.