I do not know much about jinn or ghosts but I do know about black magic. This story took place in the 1970s. My Father's uncle used to read a lot of books on black magic during his jawans, people did advise him to stay away from this kind of things or he'll get hurt but he wanted to understand how black magic works. Well, people were right, an evil entity or aura took over his mind and body and he began to act weird and do weird stuff, He only ate meat and used to growl and threaten when asked to eat some veggies(he was a veggie lover ), and drank water with added sugar, salt, and spice( ). He became very aggressive and mad and threatened to kill when someone talked to him or told him something and the last but most weird thing he used to do was go out into the streets with blankets (KAMBALS, SHAALS, RAZAIA) at midnight, after sometime when the whole khandan and Parisi's became aware of his activities they all thought that something was wrong with him. One night when my great uncle went out with the blankets, my grandfather sent my eldest uncle to follow him and find out what he was up to, Next day when the whole family asked my eldest uncle about his findings, he told them "I saw him throw blankets at dogs, he was trying to capture them but could not succeed", this find really scared everyone and they planned to act against him soon but before that something happened,
One night when his daughter took tea to him, he became very mad and spilled the tea and threw the cup under his chaarpai and then attacked her, she ran downstairs screaming for help, her cries were thankfully heard by the neighbors but he had already attacked them, he took a nasty bite out of her wife's face(Gaal main use gosht nikal gya), after that I don't know how but the family then locked themselves in a room for safety, he tried to smash the door and he did succeed
but thankfully by then the neighbors had broken into the house, my father told me that it took around 15 men to take him down. The next day my grandfather took him to a PAGAL KHANA or Mental hospital ( What........ you expected him to be taken to a baba/molvi ). There he was given massive shocks and was kept for quite some time. After a couple of weeks, he was back to himself again, when asked what do you remember he said that he was reading one of his black magic books and was trying to do one as well. My grandfather burned all the books he had on magic, hypnotism, exorcism, ghost calling, etc ( he had a room full of books, he still has ).
Don't worry, his wife was okay although she still has a dreadful mark on her face.