Kordish ceremony

Last night I was watching parts of a film called "Beyond the words" .Have you heared of it?Before starting showing that ,they wrote" We tremendously advice you not to see this film if you are under 18 or very softhearted." and you know, this sentence almost make me mad to see what they are presenting.
It was about kind of Kordish people who are living in some parts of Iran,a documentary film.It starts with very beautiful sceneries of Zagros mountain in Iran and then has a look on the native people with those nice dressing, then gradually focus on some old men ,long haired and long beared( specially in white).They were going to have a wiered festival.
This ceremony starts with a kind of dance ,you round yourself again and again,everybody do the same to reach the certain moment,then someone comes and sit on a chair between them,and then another one comes and strikes a niddle with a hammer in his head!!!!but no blood comes out!They show it as a sign of savagery in Iran and at last they said " Look what a ... people they are"
I have a friend who has done some researches on this type of life.I phoned him and heared some other things which was realy nice.
He said these people believe in other forces which have effects on our life and they study on knowing them for years and after a long time they reach to a point which they can say they can do such a thing.When that man is hammering on a head the other man si concentarting and getting help from that forces ,so he pushs his soul out of that certain part of his body,it results in no bloodshed and pain in his head and if he doesn't lose his concentartion nothing will happen ,but if just for a moment he thinks on something else then he will feel the pain and blood will come out and his brain will damage,maybe he dies.
My friend said if you sit on that chair,you know all of these, so you have selfconfidence that you can finish this match.
This is one course of their school and their aim is getting nearer to our creator.
Although I think it's kind of savagery but when I Listened to him I become interested on studying a little more about these forces.If we can't see them we can't say they don't exist. They are all around us and we are able to use them if we want.