Dissociation is often seen in children with histories of complex trauma. When children encounter an overwhelming and terrifying experience, they may dissociate, or mentally separate themselves from the experience. They may perceive themselves as detached from their bodies, on the ceiling, or somewhere else in the room watching what is happening to their bodies. They may feel as if they are in a dream or some altered state that is not quite real or as if the experience is happening to someone else. Or they may lose all memories or sense of the experiences having happened to them, resulting in gaps in time or even gaps in their personal history. At its extreme, a child may cut off or lose touch with various aspects of the self.