"Well," John reasons, "we can try explaining and if that doesn't work -- I can stun him."

Simple, right? His gun has a stun setting! Shifting, still restless and fidgety, John abandons his piece of bread to tug at his short-sleeve t-shirt. It's mercifully nowhere long enough to be near his arm injury, but right at that moment it's making John feel warm and a little itchy. Or at least, he does feel both of those things. It may not really be the t-shirt making him feel them, though.