I think you missed my sarc (/s) tag on the end. I don’t think she has it at all. She went from having no control of her muscles to being able to walk unaided - all in a space of 90 minutes. That was not a result of pneumonia. It wouldn’t clear up that quick in someone that old. She has Parkinsons and it was an episode. She rested for 90 min and was probably given a strong dose of L. Dopa to keep her going for a short while.
"The unpredictability of freezing, along with efforts by well-meaning companions to force the person with PD to move, may cause loss of balance and falls."