Saw one this summer, where someone had bought an old TT. They weren't satisfied that enough was coming out the slinky - they removed the slinky, stuck the hose (the CG one that we all use) up the pipe and let it run, pouring the contents of the black tank onto the concrete around the sewer pipe, then rinsing the concrete into the sewer - holding that hose that had been up there without any gloves. He rinsed his hands with the same hose, then got in his truck and drove away. Needless to say, I spent more time sanitizing that hose first before I got to putting on the slinky.