more fun in the old days

Kollar et al. (1969) in the American Journal of Psychiatry, 126(4) pg 73 --

At 168 hours [of sleep deprivation] one of the subjects (R.S.) experienced frightening visual hallucinations while in the darkened psychophysiology laboratory. He screamed in terror, pulled his electrodes off, and fell to the floor sobbing and muttering incoherently about a gorilla. He was conforted and reassured by one of the investigators and questioned in detail about the experience. In essence, his hallucination had recapitulated night terrors, which he had had repeatedly as a small bpy. During the next psychophysiological test period he began to experience the same hallucinations and bolted from the subject room. Thereafter he proudly reported that he had "licked" his problem.