This is a recently rediscovered psychological condition, usually found in young children. The most notable symptom is crawling into a wardrobe containing coats expecting to land in a white land called Narnia.
I am worried about this disease, as I recently discovered one of my younger brothers exhibiting this symptom. Unfortunately for him, I locked the cupboard whilst he was trying to figure out how to get into Narnia.
Another symptom, particularly prevalent in Australoids, is the desire to use the primitive weapon, known as a "cricket stump" (pictured to the right), as a sword and fight off the maniacal Fratrazoid. I have yet to determine how to defend myself against my brother's aggression. I am considering the use of a weapon dubbed the Brett-Lee Yorker.
Perhaps, I should refer this dangerous syndrom to Dr. Sanity.