Jack accepts the handshake firmly without even so much as a second glance at Sebastian's hand. He's been through wars, he's seen far worse. He's starting to wonder if maybe that's what happened to this man too, though. With the hand and the carriage and still that something about him that clued Jack in that this man was a survivor.

Jack smiles down at the dog, taking in the vest as well. "Velcro, huh? Nice name. Nice dog." He pauses for a moment, but Jack's not really one to beat around the bush, so then he's out with it. "Service dog. If you don't mind me asking, what for?"