Oh nightmares! People with hypnophobia have irrational and extreme fear of sleep or being hypnotized. This phobia may result from a feeling of control loss and it can cause distress in many people. This is considered to be one of the dangerous kinds of phobias because it can cause sleep deprivation, which disrupts your brain function, weight and coordination. We all know that avoiding sleep is impossible because there is this thing called, brief microsleeps, a sleep episode that lasts up to 30 seconds. However, the extended absence of deep sleep can cause death. The struggle is real here!