While grocery shopping, john heard voices that seemed to be narrating his every action. the voices made statements such as "now he is picking up the bread" and "now he is putting the bread in his shopping cart." no one else heard the voices. john has heard voices narrating his behavior on several other occasions. what is john experiencing?

hallucination

Explanation:

John is experiencing auditory hallucinations

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.