In 99% of cases there is nothing to worry about. It is fake or some types of hypnosis. But I have found a web site with a shoking psycho-practice. It realy works and it is very unusual. It is something about inducing near death experience. It seems very dangerous for Christianity. It is even more dangerous because their books and videolessons are free through the Internet. It is spreading very quickly... Young people can say: Why I should just believe in God if I can realy do something? I mean that this practice is a very good argument for their theories... where is no God. They can prove it, but we have nothing besides just belive. Should we forbid that or what?