She has some kinda cheap shoes with a slick surface. I’ve seen American tourists in Italy who make the same mistake.
Yes, her shoe selection for stone walking, or walking stoned, either one, it was an absurd choice, but typical for one who is convinced she walks on water.
Or, perhaps her ankle and leg gave way, same as was caught on tape a while back.
They could have gotten her down those steps quicker if they would have just pushed that horrible _itch!