"I have motion detectors in my house, and one day I was walking to my dad's girlfriend's house and my burglar alarm went off. The police came to my house to find out that my dad's motion detector went off in his room when no one was there! My dad thought it was a defect, so he had the alarm system replaced. A few days later, the motion detector went off in his room ... AGAIN! So he replaced it once more, and when it happened again, we gave up and thought it was probably my mom, who passed away when I was younger, haunting us because everyone hated my dad's new GF