reminds me of the time that a plumber i knew bought a new toilet unblocking kit. It was like a plunger that discharged a high pressure air jet.
So, he turns up at the posh house and gingerley puts his new kit in the pan and releases a high pressure jet of air that clears the pan. Pleased with himself he shows the customer the flusing toilet and gives him a large bill. On the way out after getting in his van he glances up to the posh house to see turds, bog roll etc all over the roof that had been blown up the vent pipe. He just drove away .
How we laughed.