Although Mark could understand Sasuke's feelings (hell, he'd had a bit of murderous rage last night when John condescendingly patted him on the head, and that had been intended as an entirely friendly gesture) this was going too far, the arm still raised threateningly. Don't you know they're more dangerous when they're aware of their vulnerability?

"I'm sure I don't need to point it out, but unless one of you is seeking to pass the day in sedated oblivion you should tone it down." For a moment he had the odd sensation of being a babysitter. Okay, kids, play nice. Don't make me get the shock-stick.