Jack, clever in all dimensions, it seemed. Well, good for him. Clever was good.
But the next bit...
"Woah," he waved his hands in a horizontal cutting off motion. "Who is god's name was insane enough to open the heart of a TARIDS? And why? I've never even really considered it, which should tell you something right there."
He looked Jack over again. "Although that would explain why you feel so very off to me."