Taphephobia
Taphephobia, is a fear of being buried alive or of cemeteries.  People with this fear might think that they see dead people, ghosts, or spirits.  People that have Taphephobia might avoid being buried in the sand at a beach or burying  themselves in blankets.  They also might become afraid if they are pushed down to the ground in a large crowd.  Symptoms of this phobia include shaking when exposed to this fear. People who have this fear might also have Thanatophobia, fear of dying, Spectrophobia, fear of ghosts, and Pneumatiphobia, fear of spirits.