Yes, going for a walk is surely a scary topic for many of us. Yes, going for a walk sounds safe and simple, but it's fraught with peril.
Dangers lurk around every corner, behind every bush.
It had everything obvious that nobody's ever wondered about walking. It covered every aspect of walking that ever inspired widespread public indifference. You might think that a walking article so comprehensive as to include that last item is bound to cover every walking contingency and precaution, everything you'd ever need to know or want to know about the activity, and more. Alas, that is not the case. If you come upon a big puddle or mudhole during your walk, detour around it rather than plunging in and trying to walk straight through.