What Is It?

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Girl Writes A Note In Washroom; Pilot Lands Plane

The woman noticed new things about the girl as she begins approaching her seat. The girl was sitting on the seat neighboring window. She kept looking out through the window from the moment she sat on the plane. Her face was bereft of emotions and full of bruises. The girl was laying backward on the seat as if she had no energy left to keep herself up. Was she in some kind of danger or was she herself a source of it?