From the speed SecUnit stops pretending to be casually hanging around and comes over to take the jacket back, it's been downplaying how uncomfortable the whole prospect of removing its outer layers has left it. It holds out its hand for the jacket, and once it's give, promptly tries the thing on.

There is at least a half-second where it checks the length of the sleeve, and gives an experimental tug at the stitched parts to make sure the entire thing won't come unraveled with the movement. Then it glances at Jack - not quite meeting his eye, but checking to see whether he seems satisfied enough with his work.