To cope with the humiliation Billy faces when the Germans “laughed and laughed” (90) at his appearance, Billy manipulated the situation, imagining he was being observed by the Tralfamadorians in his artificial habitat.
Billy’s acquisition of this harmful mental disorder led him to create a fantasy world where “everything was beautiful and nothing hurt”.
Since the first time Billy claimed to have come unstuck in time while in the forest leaning against a tree, he has depended on an alternate reality in which he has created a new life for himself to avoid thoughts of the horrific events he witnessed while in Dresden.
Although not officially diagnosed until the 1980s, the mental disorder had been terrorizing its victims throughout history.
One will understand Billy Pilgrim inevitably suffers from this disorder when one discovers what it is to have PTSD: “Post-Traumatic Stress Disorder is an anxiety disorder that can develop after exposure to a terrifying event or ordeal in which grave physical harm occurred or was threatened.