In Islam we believe in abnormal and gin because we think that there is a whole world for them. There is the good gin and the bad, the Muslim and Christian for example and they live under their own life and way of living. They can see

us and we can't, they maybe afraid of us but they have super powers. They are sharing with us this earth and universe they get annoyed like human beings from loud voices and any other things.

When they get angry they could harm you.

 So, you have to respect them, But if it happened and they harmed you. You need to read holy Quran, I mean soora and doaa. In Islam we repeat some sooras (it's some words from holy Quran) and this sooras and doaa we say them every day and night. It's like a shield against bad thing including people and gin.

They will not hurt you or scare you, as I said that there are two kinds of them the good ones and the bad. So, some of them they will hurt you if you mock at them or annoyed them.

 And they could harm you in different ways (by diseases, madness and many other things). 

so be careful!!!!