Sorry, that has happen. I started taking pictures before and after.Ive never had full on dents, but, i had my car in the shop twice (once for oil change once for CVT recall on 9th gens) and both times they ran it through their on site car wash (they used to do it by hand) and both times big black scuff marks have appeared. The first one was above the driver side foglight area and the second time was on a side view mirror. (I have a taffeta white coupe). Sadly, i didn't notice these until days after the car washes and seriously doubt i could take it to honda and blame them for it (and have them believe me anyway).
Lesson of the story, its always better to do a hand wash. If you can't manage that, then a touchless carwash is usually pretty safe. The washes with the big rollers get tar, rocks and other debris stuck to the foam rollers and those are what cause scratches, bumps, dents etc.