" I said ‘not so much,’” Dr. Russell said. “Not so much as what? Having your head stepped on by an elephant?” “Not so much as when the sensors connect to each other,” Dr. Russell said. “The good news is that as soon as they’re connected, the pain stops. Now hold still, this will only take a minute.” He tapped the PDA again. Eighty thousand needles shot out in every direction in my skull. I have never wanted to punch a doctor so much in my life. "
― John Scalzi , Old Man's War (Old Man's War, #1)