From another place:
Did score a spectacular own goal in my own place.
In my self build I have a bathroom in a garage that is below the sewer pip e so I fitted a chamber with a pumping solution. Wife, four kids inevitably it gets blocked. One time, when it was backed up I had disconnected the ou tlet pipe but had forgotten to switch off the isolator - once the obstructi on was cleared it kicked into life and shot 300+ ltrs of s@#& into the air like I had struck oil. Of course what goes up has to come down on top of me and the cars.
Wife wouldn't even let me in the house to clean off - I had to strip down and get hosed off on the patio. To add insult to injury, I had to back into it with wellies and clean it all up and its no fun trying to get all that off cars, door seals, trim, wheels then the patio all the plants, it is no fun picking used toilet paper out bushes.
Sospan at
Owain