With one of them uttering 'So nearly free' before they die. In the end, the commander demands a researcher to enter the room and start killing the prisoners. This mysterious gas turns the prisoners into violent zombie-like monsters.

The Russian Sleep Experiment tells of Soviet Union agents and scientists experimenting on both political prisoners and prisoners of war during World War II, in which the prisoners are kept in a sealed-off room which was filled with an experimental gas to prevent sleep. In 2013, an independent film adaptation of the story was released, called Living Dark: the Story of Ted the Caver. The blog has not been updated since the final post. In a final blog post, Ted writes that he and his companions will be bringing a gun into the cave after experiencing a series of nightmares and hallucinations. As the explorers move further into the cave, strange hieroglyphs and winds are encountered. The story is in the format of a series of blog posts. Ted the Caver began as an Angelfire website in early 2001 that documented the adventures of a man and his friends as they explored a local cave. However, in 2018, after extensive research on 4chan's /x/ board, this rumor was debunked the original image came from Japanese website pya.cc from September and November 2005. The story above wasn't made by Sesseur himself, but rather 'a fan of his earlier work.' A 2013 article asserted that the original image of Jeff the Killer was an extensively edited picture of a girl who committed suicide in the fall of 2008. The character of Jeff was created by DeviantArt user Sesseur.

The story quickly became one of the most popular creepypastas and would inspire many other stories, including Jane the Killer.

He becomes a serial killer who sneaks into houses at night and whispers 'go to sleep' to his victims before killing them. After being discharged and having his bandages removed, Jeff becomes insane, carving his own face to leave a smile-shaped scar, burning off his eyelids, and killing his family. There, the bullies doused him with alcohol and set him on fire. His parents (being rightfully concerned) force him to go to a party, where he runs into the bullies. The fight ends with Jeff being nearly arrested for assault, which his brother Liu takes the blame for, getting taken away resulting in Jeff becoming very depressed and introverted. In the story, a teenager named Jeff is attacked by a group of bullies. Jeff the Killer is a story accompanied by an image of the title character.

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