My legs itch as well as hurt and I curl my toes to see if the itching stops. It doesn't. I look down at the car keys in my hand. It's too late to drive to a safe place—the itching has crystallized into a sharp burn. Keys in my pocket, I stride onto the streets, looking for a quiet place to Change. As I walk, I monitor the sensation in my legs, tracing its passage to my arms and the back of my neck. Soon. Soon. When my scalp starts to tingle, I know I have walked as far as I can so I search...