I once knew a woman that could roll herself into a perfect ball. She rolled all over town. It didn't seem that unusual; sad, but not strange. Lots of people are all balled up. I caught glimpses of her face. It was often expressionless. She had a flat affect. Sometimes, she'd come out of her ball, and smile. She was gorgeous, educated, and had a great sense of humor. But when I'd get too close, she'd get back into her ball and roll away.