Despite being a fact of daily life and lying just below our feet in cities all around the world, sewer systems are places in which most of us never step foot (lucky for our shoes). For this reason, sewer systems remain places of mystery and folklore. Throughout most technologically developed cultures, urban sewer legends and myths of strange subterranean sewer dwellers persist in the modern imagination. While a race of eyeless Morlocks hasn't been found yet, developments in Derby, England are hinting that something strange might be afoot in at least that city's sewers. According to the Derby Telegraph, emergency personnel were called on March 8 after residents reported unexplained knocking noises coming from nearby manholes. Another witness, described as a "teenage skateboarder at the scene who did not wish to be named" also reported hearing similar sounds a few days before this incident. Residents believed that an individual might have gotten trapped below the streets, but when