Aidan was so swept up in his own disdain and distaste of his surroundings and the people in it that he didn't notice Sandy's approach until she was there and speaking.
If he jumped (which he did) he'd lie about it later and claim that he did no such thing, he had a reputation after all to maintain. Sure nobody here knew him as well as others in previous facilities but still he felt he had a certain attitude to honour.
Fuck.
And then it dawned on him that she was saying something about words he most definitely hadn't spoken aloud. "Pretty sure I didn't say anything," Aidan muttered as he turned his head to regard Sandy.