Plank smashes through windshield - GIF

[wizard69]

And he probably drove on never knowing what he had done

Yep! There likely wasn't even a sound when those boards flew off. Decades ago one of the guys I was working with had a windshield blown out when a loaded truck had a bunch of rocks roll off the trailer. In that case the truck was overloaded in the sense that the rocks where overflowing the walls.