The Russian Sleep Experiment

Jesse Cornett narrates this creepypasta classic tale of psychological terror by an unknown author, about five political prisoners who, in the 1940s during World War II, were deemed enemies of the Russian state and first imprisoned, then experimented upon by researchers, who intended to keep them awake for 15 days by means of a then-untested gas-based stimulant. Everything went fine for the first five days. After that, everything changed.