Annie let go of the cable, it zipped back towards her and back into her neck, and she stood to follow the Doctor. She looked puzzled and followed the Doctor carefully, before she edged her way into the box, puzzled about how they would both fit inside such a cramped space. Not that she was worried, she was fairly confident that her martial arts would hold their own in such a small space.
It would therefore, come as no surprise to the doctor that she looked puzzled as she entered the considerably larger space and checked behind her to ensure she had gone through, indeed, what looked like a small letterbox door.