Well, I had one of those "bone-headed moments" at my last campground.
After arriving at my last campground, I stopped at the dump/fill station to fill up with fresh water. While I was at it, I decided to rinse the black tank, so I hooked up the "red" hose (posted as not safe for drinking) to the black tank flush inlet and let it run for about a minute. After I shut it off and hooked up my slinky, I discovered I was too far from the sewage dump for my slinky to reach. So, I disconnected the slinky, got in my truck and started pulling forward . . . but I forgot to disconnect the hose from the black tank flush inlet. Looking at the side-view mirror for proper alignment, I saw the red hose wand bent forward, so I hit the brakes, opened the door, and jumped from the cab. But I was too late! Just as my feet hit the ground, the hose broke loose from the inlet; or rather, the hose broke the inlet loose from the trailer! What a BONE HEAD!
I removed the inlet from the hose end and tried to "super-glue" it back on, but I wouldn't hold. So, my first stop after reaching my current campground was the Camping World store in Grand Rapids. I was able to pick up a replacement for about $10.50, and installing it was an easy 5-minute job.
The moral of the story: Be sure you remove your hose before you dump your load.
NOT WHAT I MEANT!