The experiment was supposed to take place for a month, though none of the patients lasted 4 days. Any who had not quit within the 2 or 3 days had become totally insane; many never recovered.
In the experiment, the patients were placed in a room without contact to the outside world. They could not hear, they could not move, they could not touch and the could not see. This resulted in extreme hallucinations; anything from hearing running water to seeing imaginary missiles being fired at the patient from an imaginary rocket ship.
This reaction was caused by a mix of an over-active imagination and a traumatised mind, tainted by dread.
In my trailer, I want my "Wandering-guard" character's paranoia to take over,