"The Russian Sleep Experiment" is an urban legend based on a creepypasta, which tells the tale of five test subjects being exposed to an experimental sleep-inhibiting stimulant in a Soviet-era scientific experiment.
This popular story, true or not, recounts an experiment that took place at a test facility in the Soviet Union in the late 1940s. In a military-sanctioned scientific experiment, five political prisoners were kept in a sealed gas chamber, with a continually administered airborne stimulant for the purpose of keeping the subjects awake for 30 continuous days. The prisoners are falsely promised freedom if they complete the experiment.
The subjects behave normally during the initial days, talking to each other and whispering to the researchers through the one-way glass, though it is noted their discussions gradually become darker in subject matter. After nine days, one subject begins screaming uncontrollably for hours while the others have no reaction to his outburst. The man screamed for so long that he tore his vocal cords. When a second begins screaming, the others prevent the researchers from looking inside by pasting torn book pages and their own feces on the porthole windows. A few days pass without the researchers being able to look inside, during which the chamber is completely silent. The researchers use the intercom to test if the subjects are still alive, and get a short response of a subject expressing compliance.
On the 15th day, the researchers decide to turn off the stimulating gas and reopen the chamber. Upon looking inside, they discover that the four surviving subjects have performed lethal and severe mutilation and disembowelment on themselves during the past days, including tearing off flesh and muscles, removing multiple abdominalinternal organs, practicing self-cannibalism, and allowing 4” of blood and water to accumulate on the floor. The subjects also violently refuse to leave the chamber and beg the scientists to continue administering the stimulant, murdering one soldier and severely injuring another who was attempting to remove them. After eventually being removed from the chamber, all subjects are shown to exhibit extreme strength, unprecedented resistance to drugs and sedatives, superhuman abilities to remain alive despite lethal injuries, and a desperate desire to remain awake and being given the stimulant. It is also found that any one of the subjects who falls asleep dies instantly.
After being treated for their injuries, the surviving three subjects are being prepared to return to the gas chamber with the stimulant, with EKG monitors showing short recurring moments of brain death. Before the chamber is sealed, one of the subjects falls asleep and dies, and one researcher draws a gun and kills another subject as well as a staff member. With only one surviving subject, the researcher asks what he is, to which the subject identifies himself as an inherent evil inside the human mind that is kept in check by the act of sleeping. The researcher shoots the prisoner in his head and then shoots himself saying his final words.