Speaking of bizarre tangential zig-zags, Amos, there have been a few cropping up around here lately, and I'm worried about it.

I spotted a bizarre tangential zig-zag on one of the basement walls, for instance. It seems to have been made by a blunt instrument of some kind.

My dog was out in the backyard yesterday and he made a bizarre tangential zig-zag! I have no idea why.

I have seen several birds make bizarre tangential zig-zags as they flew over my property.

What does it all mean?