There I was, driving down the highway, when this large yellow truck pulled in front of me. I caught a flash of something shiny and thought, "What the hell?"
Then I started laughing.
These things were swinging beneath the truck.
I'm not sure why the owner opted for silver. I would have gotten brass, myself. I mean, after all; if I want to make a statement about the toughness of my vehicle, I'd opt for balls of solid brass.