"Oh," Ukraine says dumbly, feeling foolish, and then "oh," again, a little faintly, and she lets go of the Doctor, her hand fluttering uselessly before she drops it to her side. "I'm sorry," she says, both to the Doctor for panicking and to the TARDIS for not trusting her. "I have to admit, I'd have probably looked for stairs..."

She peers up through the corridor, still a little hesitant, then follows the Doctor's instructions, squeaking slightly as she lifts off. Then after a moment -- "Actually, that's kind of fun...!"