https://consumerscompanion.com/hypnagogic-sleep-paralysis-causes-and-symptoms/Sleep paralysis is commonly recognized as a parasomnia or an undesirable event that is associated with sleep. The episodes are usually accompanied by hypnagogic experiences like visual, auditory, and sometimes even sensory hallucinations. These are known to occur during the transition between sleeping and waking. These hallucinations usually fall into three main phases or categories.