"Jack somehow got hold of the hand that fell to earth, still had all that residual regeneration energy in it, kept it...fresh. Then, there was...a situation. I got injured. Rose, I." He runs his fingers through his hair and down the back of his neck. "I nearly regenerated again, but I was able to channel that energy into the hand. Then someone, someone..." Who was it? This was important, and with a sudden sickness to his stomach, he realizes he's forgotten someone incredibly important. "A new body, half human. One heart. Who was..." He shakes his head, pinching the bridge of his nose. "I've changed a bit, that's all, Rose. One heart...one life."