"She was whizzing all over the place on it with ease and grace. It was an excellent sight."
I was in a country other than the United States and I saw an older lady run to catch a bus. She was easily 65, maybe 70. It was neither interesting nor noteworthy to any of the other (swiss) people on the street with her.
Walking is the universal medicine and we live with an enormous burden of health, fitness and longevity problems (including obesity, diabetes, "lower back problems", knee and hip issues, etc.) due to the car culture that we live in and the related near refusal to walk anywhere.
No, this was not an excellent sight - it's the sign of a sick society that will do anything to avoid the simple, free and easy remedy to almost all of their problems.