Maybe you heard about the experiment... In 1963, Randy Gardner, an 18-year-old high school student who had not slept for exactly 11 days, was scientifically registered and Included in the Guinness book of world records. On the second day without sleep he felt dispersion attention, on the third – a strong fatigue and irritability. On the fourth day Gardner began hallucinating: it seemed to him that he was a black footballer Paul Lau, he saw a man instead of a road sign. On the fifth day, the symptoms of Alzheimer's disease appeared. Later, the representatives of the Guinness Book refused to register such records, because they were recognized as harmful to health.