Whatever. [It's terrible to be so dismissive when Reid is adamant about ensuring that he doesn't die, but Nathan doesn't care. He's too drained to argue and too spiteful to refrain from reminding the doctor that he thinks that he's wrong. If Nathan has to keep fighting himself, he wants Reid to know that any collateral damage is partly his fault.
(He doesn't know how to feel towards Reid. There might be other people here who care if Nathan remains alive, but Reid is the only one he can blame for saving him. He wants to push the doctor away forever almost as much as he wants to latch on to him and try to believe that he can be fixed.)
It's easier to focus on Kitty. Far less complicated.] What kind of restraint? How would it work?