Spock decides not to question that first statement further. He's really better off not knowing.

"I recall that." he replies to the second. As he's sufficiently pinned to his seat, he'll lean back and steeple his fingers in a meditative pose. "They were on my mind the second I awoke. I had concerns. Such as, what might've happened if I'd disappeared from the ship, and you hadn't been there to care for them."