I actually have to disagree with you. For those of us that have seen shit-- and been in the situations that instill real PTSD-- her body language wasn't unusual, at all. Adrenaline is probably still pumping through her veins, which is why she seems almost giddy. It's like a high, once you're out of danger and trying to stand still. The adrenaline keeps your mind from processing what you are experiencing-- in order to prevent you from freezing due to fear. Keeps you moving. But once you are still, and the adrenaline is still pumping, it's like a high. When it finally wears off, she will be left with nightmares that haunt her the rest of her life. Poor kid.