Anticipating that some evangelicals may be freaked out by any discussion on trance experience, or alternatively, have no idea what I am talking about, I though I'd draw your attention to an interesting article from John Court entitled Discerning between the Emotional, the Psychotic and the Spiritual
Dr John Court was Professor of Psychology in the Graduate School of Psychology at Fuller Theological Seminary, Pasadena, and is now Director of Counseling at Tabor College in Adelaide.
John examines the phenomenology of trance from a Christian perspective and offers some valuable reality checks, both pro and con.
I would highly recommend his book Hypnosis Healing and the Christian
Curious Christian 