One very early morning a few years ago my sister glanced out her front window and saw police, ambulance, fire brigade, and neighbour from two doors down being escorted away by men in white coats. BiL, who was raised in NY, didn't even raise his eyes from the newspaper when she said "Holy Crap, what's happening?". All the white goods had been dragged out of the house onto the front lawn. I'm friendly with the neighbour who shared a party wall with that house, and she told me the tale when I ran into her a few days later.
Warning...this is a saga! My friend, K, told me that her neighbour (I'll call her B for Batty) got involved with some charlatan who was into ley lines. This guy told B that several ley lines crossed under B's house, and to prevent a build up of some explosive force B needed to persuade K to buy some wonderful machine which would counteract the build-up. Machine cost hundreds. Not un-naturally, K said 'no', and was harrassed and harrassed about it.
The night before whatever it was happened (or didn't happen) B came to her, hysterical, and said the charlatan had warned her the pressure was reaching danger levels. Evidently then, during the night, she dragged all her white goods outside - not bothering to disconnect the washing machine or dishwasher, so the pipes gushed water all night. At six in the morning she phoned all the emergency services saying there was going to be an explosion, and they were all mobilised.
K's downstairs was completely ruined by water flooding through the walls and under her back door, she had to replace all carpets and flooring. She saw B's mother a few days later and asked how B was, and got an earful of abuse from the mother, about how none of it would have happened if she hadn't been so mean, and had bought the machine as asked. 
When B returned from the hospital she knocked on K's door, all bright and breezy, and said "I see you're getting new carpets laid, I need to buy new ones as well, can I see how yours look?". K was more polite than I would have been, and just said 'sorry, you can't come in my house and I don't want to communicate with you again'. B went off completely unfazed 