Automated car washes make me shudder even thinking about them.
When I lived in Denver a work-mate of mine took his fairly new car into get the winter road salt and crud off during some nice weather.
The car prior to his had one of those magnet mount CB antennas on the trunk - it got torn off in the rotating overhead brush, and no one noticed (everyone is inside watching the neat things happen.) When my buddy's car got to that brush, it proceeded to beat the hood, windshield, top and trunk of his car with the antenna end sticking out of the brush. . . not a pretty sight! Cracked windshield and lots of dents up and down the metal work.
Of course, the wash operator points to the sign pointing out that they weren't responsible for "antennas, mirrors, etc" and my buddy had to report the damage to his insurance company.