"Alright..." He knew that look that scared kid, dear in headlights, blood leeching from the skin look. Then there came Loki. And Jack couldn't miss the flesh curling back from a bone or two in his fingers. Probably up his arm too, but sleeves covered that up.
"Kid, you have to quit staring at him. I would do something drastic to get your attention but that would only hurt me. So.. Keep me from having to hurt myself." He didn't want to have to resort to something that might bring on a different memory. One that he was all to happy to have buried.