She was limp, a rag doll, the left side of her face mostly torn off.
Imagine yourself a rag doll and with arms hanging loosely by your side, begin to shake your hands.
Idioms and Phrases with rag doll
A limp, ineffectual person, as in You won't get a decision from her; she's a rag doll when it comes to making up her mind. This expression transfers the limpness of a soft doll made from scraps of cloth to human behavior.