I had a cement lorry pull out on me a few years back, straight from a building site. As he straightened up, a similar thing happened. I didn't realise until I stopped a good hour or so later, that I had cement splatter up the side of the car where I had driven through it.
I was on the way to the airport so could only use bottled water to rinse it off. When I came back from holiday and had chance to clean it properly, it had eaten away at some of the clearcoat and up close you could see the marks until I sold it.
It was nothing as bad as this though!!