Those typically hurt the most - lightening strike falls, that is...
Personally, I wouldn't describe Ashley 2A fall as 'slipping off an edge'. It happened fast, of course, but as I was watching it on live tv, I KNEW that 2A was going to be underrotated the moment she got up in the air. I'm not a technical specialist at all, but I think the timing was off and/or there was just not enough speed and height. She fell because of the underrotation.
I did read on GS that it was actually the fall on the 3S that hurt her hip, which surprised me as *that* did look like a typical slightly underrotated jump results in two footing + falling off the edge. The Dutch commentator was saying on the replay "that *didn't* hurt, skaters are used to that, the fall on the 2A otoh..." But apparantly the fall on the 3S did hurt?