Anita Moorjani was completely riddled with cancer after a long struggle. The cancer won. She was brought to the hospital dying and doctors said that basically that was it for her. Then she went out of her body and looked around and saw that she could just go back. It was that simple. So she came back into her body and it was free of cancer.
But would she have come back if she were single and lonely, or if she didn't love her husband? Would she have come back if she felt that her husband didn't love her, that she was fat, ugly, undesirable? If she hated her other family members? Perhaps it only worked for her because she had very compelling reasons to want to come back?