My mother is a physiotherapist who works at a school for physically and mentally disabled children. She has full acces to the building, and both me and my brother and sister had birthday parties there when we were kids. There was a swimming pool, air cushion, we had wheelchair races, et cetera and so on. My sister is the youngest, and during one of her parties I had come along to help prepare. So we get to the gym (where the air cushion was amongst other things). Its pitch dark, so I feel for the lightning switch. I find it and press it, only for a huge racket to begin a couple of seconds later. Yes, it was the fire alarm. Ten minutes later a fire truck was standing outside the school. Ouch.