Living in a city (Albany, NY) means that when I run I’m almost always running on a sidewalk. Oftentimes these sidewalks are full of people who, for some reason or another are, walking. Since I don’t listen to anything but the thoughts in my head when I run, I’ve found that I started classifying the different types of sidewalk walkers I run across.

While some walkers are merely harmless pedestrians trying to get from one place to the next by the slowest means a human can move, other walkers can be downright dangerous…