The
Guinea Pig films (from the Japanese
"giniipiggu") are a series of
1980s Japanese horror films with extremely detailed
special effects. According to
Snopes, the films became infamous when
Charlie Sheen mistook one for a
snuff film and contacted the
FBI to report it.
[1] The tapes gained notoriety in the late 1980s and early 1990s when the first five films of the series were found showcased in the 5,763 videotape collection of Japanese
serial killer Tsutomu Miyazaki, who re-enacted scenes from the films as a part of his crimes.