Ten terrible city legends which were truthful

Each of us at least time in life heard any city legend. To small children say that if they will swallow of water-melon sunflower seeds, in their stomach the big water-melon will grow. Teenagers like to frighten each other of "houses of murders", located in the neighbourhood. Fascinating city legends are done with that people who extend them, believe in their truthfulness. City legends arise from mysterious supervision, real experience and historical events therefore they sound much more plausibly, than usual horror stories...