Impossible. Although the word scares the layman, trance is nothing more than a heightened state of concentration. Simple, isn't it? When you are attentively reading a book, listening to a song you like or watching an interesting movie, you are in a state of trance - heightened concentration. In fact, it is very likely that you are in a trance even now reading this text. Is there any danger in this? Yes, it is. In a hypnotic trance, there is no danger either. What differentiates one trance from another, such as a reading trance from a musical trance, for example, is where the instructions come from, what guides your attention. In the case of hypnosis, what guides your attention is the hypnologist; in reading, the book; in music, the melody, the instruments, the voice; in cinema, the plot, the images and the dreams. In short: there is nothing more natural than trance, whether it is hypnotic or not.