I've heard that theory before. My thought is our guardian angels are there for a reason, and that they guard us during these transition periods from one side to the other.When my mother was dying, I did see a shadow person in the hallway, like they were watching but no hood. It was like a shadow stick person. I read once that when a child is born good and evil spirits fight over the soul of the child, I wonder if good and evil spirits fight over a person's soul when they die? Just a thought.