Jack had put two and two together between the smells he'd picked up and the conversation they had, but seeing it is definitely... a thing. He takes it in, mostly sidelong without looking directly at the gunports and metal joins, as he collects the jacket.

Then he turns away, back to his table. "I will need to measure your forearm. I will try not to touch you, if you can hold your arm out still for me. The tape measure will need to touch you, though. Is that all right?"