Also, if you really want to confirm the existence of Jinn possession, you'd have to go to a Masjid where Ruqyah is being done or the Shifa centers where Sihr and Jinns are treated. I'd recommend not going unless you want to risk possible possession though lol.

Also, I've taken part in reading Ruqyah on an individual. Trust me, it's 100% real. Some of the Jinn would start talking in different languages like Japanese, Chinese and German lol. And it was really creepy. Not to mention that the person the Quran was being read on was a Refugee Somali, she had no clue how to even speak English much less Japanese/Chinese/German.

Also, the person that the Ruqyah was being read on was a female with a low voice. At first, her voice was the same. However, once the Jinn started speaking, her voice did a 360 degree to a grown man in his 20s and started speaking in different languages that sounded like Japanese and Chinese to me...it was the craziest thing ever.

This other time, there was a Sudan Jinn that was a Christan, and it started chanting verses of the Bible and mentioning Jesus and praying to Jesus in arabic. Really weird...

Again, you have to actually be there. Words can't destribe it as well as real life.

Also, I could tell it was japanese because I watch Anime with my friends sometimes and I know the tune of the language.

And also, the person was getting flogged pretty hard. If the person was deluding himself, he would've snapped out of it due to pain.