Chinese water torture
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Chinese water torture is a process in which water is slowly dripped onto a person's forehead, allegedly making the restrained victim insane. This form of torture was first described under a different name by Hippolytus de Marsiliis in Italy in the 15th or 16th century.
The term "Chinese water torture" may have arisen from Chinese Water Torture Cell (a feat of escapology introduced in Berlin at Circus Busch September 13, 1910; the escape entailed Harry Houdini being bound and suspended upside-down in a locked glass and steel cabinet full to overflowing with water, from which he escaped), together with the Fu Manchu stories of Sax Rohmer that were popular in the 1930s (in which Fu Manchu subjected his victims to various ingenious tortures, such as the wired jacket). Hippolytus de Marsiliis is credited with the invention of a form of water torture. Having observed how drops of water falling one by one on a stone gradually created a hollow, he applied the method to the human body. Other suggestions say that the term "Chinese water torture" was invented merely to grant the method a sense of ominous mystery. The victim would be stripped of their clothes, shown to the public, then tortured. They would be driven insane while bystanders watched and mocked them.
There is very little evidence pertaining to the effectiveness of the method; however, the television series MythBusters investigated the effectiveness of Chinese water torture in episode 25 of its 2005 season, and found its effectiveness to be extremely useful. It is, however, important to note that this was a small trial consisting of only four people and the method was ineffective when the subject was not restrained.