I never use my WM-F100 II either, though it was crazy-small. Never use the Discmans I have either :^(
My DIscman long since discarded ...would SKIP,....while I was riding a bicycle
These were not drastic skips... of the type I associate with vinyl records...but they were a problem.
I actually got a ticket....for wearing my discman’s EARPHONES... while riding a bicycle. What chance is there of that sort of thing happening today?