There is that small but immediate moment of alarm that Sadie is familiar with from both her eyes as she appears in an unfamiliar place but, combining the headache prior and the fact that she cannot feel any breeze or temperature, she is quick to realise that this is like what happened with Ben. Which means that this is a memory of Walter's...

Sadie spots the young girl but glances about, seeing if she can spot Walter and frowning when the girl remains the only person in sight. This was very strange but she continues to watch the girl, maybe she would glean some answers from her.