The legend: A family moves into a new apartment and soon discovers that the tap water there is discoloured and tastes funny. A search of the water tank later reveals the culprit: the dead body of the flat's previous resident.
The truth: Although this urban legend has inspired fiction, with TV show How To Get Away With Murder and the horror movie Dark Water adapting it, it eerily came true in 2013 when the body of Elisa Lam was discovered in a water tank of an LA hotel.
Lam's death remains an unsolved mystery and strange footage of her inside an elevator shortly before her death only makes the case more perplexing. The video shows her exiting and re-entering the lift, talking and gesturing in the hallway outside, and sometimes seeming to hide within the elevator.
Since the footage was circulated online, many theories have attempted to explain her bizarre behaviour. Some claim she was having a psychotic episode (Lam suffered from bipolar disorder) and her death was the result of a suicide, while others believe she was trying to hide from somebody who was pursuing and would later murder her.