Well I've got a good one. I was flushing my BWT. I normally stay with it and will close the black water valve for no more than 3 minutes for the tank flush to do it's thing. However, on the 5th flush, I got to "multi-taking." The next thing I know, water is pouring down the sides of my RV. I can't imagine how bad this would have been had it occurred during the 1st flush! This rig is less than a month old. From what I can tell, nothing penetrated into the walls as the crevice seals seen to have done their job.