As soon as he mentions cloudy spots, Shepard's attention is directed up the hallway. She hadn't exactly relaxed just before, but now she's distinctly back at attention. Those things are really, really pissing her off.

"Is this a trap?" Then, re-evaluting the size of the containment unit, "Or for a study?"

At the overkill comment, Shepard glances back at him, and offers him a wry smile. She can read awkward. Boy oh boy can she read awkward. No harm in seeing if he can relax, at least a little bit.

"Given the shit those things can pull, not sure I can accuse you of overkill, honestly."