And speaking of walking backwards (as I was) – this has shown up in the tumblr-o-sphere:
She claimed it was to deter a “snapperazzo."
"I saw the guy with the camera and wasn't in the mood so I hiked the whole trail backwards and my security told me when to make turns."
So a security man, not a fitness instructor. Though frankly I’d have thought that walking with a security man was a pretty good way to ruin a walk. So little room for solitude. So little room for reverie. Rousseau would weep.