One time the cruise control on our little motorhome failed while we were on a trip. I took it in for repair. When I came to pick it up, the manager had a strange look on his face. He took me back to his office and told me that they had had a minor accident with my rig, but no damage was done to the rig. He said that when they put it up on the rack they accidentally knocked the valve off the black water tank (which just mounted with a hose clamp.) I looked at him, appalled. "But the tank was full!" Yes it was. I was handling it fine, until he snickered. Then we both lost it. Of course we weren't the ones who had to clean it up.