"Oh, I know," replied the Doctor, grinning. He didn't mind long walks; in fact, he rather liked them. However, being reminded, however accidentally, that his ship (his ship!) wasn't flying terribly well at the moment set him off again, and before he knew it, he was stalking through increasingly tall grasses, muttering to himself a bit in spite of the other's presence. "Mess with my TARDIS, will they..."