I am not kidding you. Beware of road debris, especially when you're too close to a vehicle in front of you, say, 20 feet?
It happened to us when the lorry in front "scooped" up a piece of corrugated cardboard a few inches into the air with its air pressure. And we're right in front of the cardboard when it landed. Smack! Crack! And that's it. I know something is very wrong when I do not see the cardboard from my rear view mirror.