Jack took out a long breath and flopped his head to the side to look at the Doctor.

"I wish I could tell what you're thinking when you look at me," he told him honestly with a slight slur to his voice. "I just can't read you, Doctor."

He sighed and reached his hand out, tapping the Doctor's arm as if to let him off the hook. "Don't worry. You don't have to say anything. I understand."