Had the same issue when a flatbed stacked with hay bails passed us on the left: “Sure would be lousy if that strap failed”, when it did. Hay bails bouncing all over, managed to steer out of it.
Ever get the feeling that we only see a small part of reality? That there are things going on sort of behind the scenes that we have no idea of?
I see people in flat bed trucks bouncing up the freeway regularly with open boxes of nails in the back bouncing around.