"Nope, I'm definitely not one of those," the Doctor murmured, watching Jake carefully. He pushed down his own paranoia and wariness caused by the 'fog', thankful that as a timelord he could still do that to some degree.
"Sonic screwdriver, remember?" He pressed the button so the sonic lit up and whirred again. "I've scanned you with it before and showed it to both you and Neytiri... well, the first Neytiri I met but still.. It's my tool."