You can see her stretch her stride a bit just before taking the first fall....and that's what she also did a few steps later.....over reached.
My guess is that she was TIRED....very, very tired.....like an old lady who needs assistance tired.
Nothing to do with shoes, it's a vision perception brain thing.
Old knees don’t lock. Hillary looked like her knees wouldn’t bend.
... plus, look at the people coming downstairs after her. None of them are flailing like she is. She puts her foot down and straightens her leg to take her two more steps down!
No one else walks down those steps like that or needs assistance!