Jack finishes off the apple, so much for paying for it as he deposits the remains into a trash can. "Okay, so it's his fault he found that head."

He nods his head again. "So, what were you here to buy?" He asks her, and he thinks to that Cyberman. "And, if he didn't stumble onto that head? I think it would of happened either way, that means we wouldn't of known what shot you."