In that photograph, she was most definitely in the "lands on her feet" category and I deemed it a position in balance.
All the same tho, I've been a very comfortable and stalwart believer that, at least in jumping (and especially in eventing haha), form follows function. Be strong. Be in balance. Go with your horse. The various body parts will more or less take care of themselves when those criteria are met.
My case in point being these little illustrations I've created. In my mind, there are only two here where the rider most definitely would not land on their feet were the horse to mysteriously evaporate out from under them (well. three if you count the one who is already totally fucked haha). There's a couple more where the rider might teeter precariously for a moment, sure. But I'd still class them in the "acceptable" range.
What are the pieces that you believe are most critical to good equitation over fences? What areas in your position do you look at first? Is it your hands? Heels? Is it a level back or a line from hip to heel? Do you have your own "rule of thumb" like I do? Or do you think mine is stupid or missing a critical element?
This post is also called "open season" for a reason - I legitimately want to hear all about it. And am hopeful that these friendly little illustrated models might serve as a case point. Do you see yourself in any of them? Or is there one standard in there that you would hold above another?!?