This 22 minute YouTube video by Forrest Knutson will enlighten you. Be sure to read the user comments after watching his YouTube video.
I have used this therapy in my practice for over thirty-four years. I do not recommend this procedure for use on intensive emotional states (PTSD, Phobias,Trauma).
This procedure can heal these emotions: Anger, Sadness, Fear, Hurt, Guilt
Only trained therapists should use this procedure for trauma. See my posting: