False sensory perception(s) while awakening (hypnopomp refers to the state between wakefulness and sleep). This issue can be a symptom of narcolepsy.

Example: A woman awakens to an image of her dead father’s face in the window. She attempts to flee but finds she is paralyzed and helpless.

A detailed and technical overview of this category of hallucinations: http://bjp.rcpsych.org/cgi/content/abstract/169/4/459