"I really wish people would stop doing that. Guns, me, any combination and it never ends well." So the Doctor didn't sound overly worried, but he had stilled, even tensed. His hands stayed where they were, but that put one of them very close to the sonic screwdriver and that was a definite option. He didn't care for weapons much, but he could disable them, given half a chance.

The question was whether he'd have half a chance. No good to reason with John, he knew enough about him by now. "I'm worth a lot more alive than dead. Not just sentimental value. High bounty from several species, just for the privilege of killing me. Lots of money, dead Doctor, everyone wins. Well. I don't, but I reckon that's beside the point."