As Animus runs off to close the door, Jack folds his arms kind of like he's cold, but he's not shivering or even doing anything else people would associate with trying to retain body heat. He looks around at the banners to admire the craftsmanship... Or rather, to take his mind off of the developed crowd.
When Animus returns, Jack moves closer to him, but not uncomfortably so. At least, it doesn't look like it'd be uncomfortably close. Jack's face betrays no emotion, except for maybe ponderousness.
One of the few friends I've made since Awakening besides Arthur... Friends...
Jack looks at Orphan curiously at his excuse, but isn't able to further interrogate before he goes to meet up with Tam. Jack instead turns to Shadow. "No, I don't think we've met. I'm Jack."