Nethra walks into doors and doesn't see curbs. Once I watched her walk across a tile floor with a crumpled sticker stuck to one shoe. Every other step made a popping sound and I had to tell her before she noticed. Her hair will get in her food and her food will get on her face. Today, she parked the shopping cart and turned away, oblivious as it rolled back and followed her fifty feet to the car like an obedient pet.