I just realized that I walk this way whenever I'm traveling in an unfamiliar place and find that I've chosen a route through a sketchy part of town.

I'll walk straight through at a brisk pace with a little bit of a scowl on my face as though I'm annoyed to have to be crossing this same area of town again and none of these f'ng people had better get in my f'ng way.

Now I know why I do that.

I was told more or less this many years ago by a friend who grew up in rough neighborhoods. Paraphrasing: "When you walk around in the ghetto just walk like you're packing heat in your jacket." Nobody messed with me. I guess it's science.