Run, run, run. They were always running, Mina thought bitterly as she struggled to keep up with the longer-legged, more athletic Doctor. Her breath grew more ragged with each burning step, and she was sure she was about to collapse when the Doctor finally held up his hand and slowed. Mina immediately stopped and leaned against the wall, gasping for air, while the Doctor cautiously peered around the next corner. She could tell something was up when he turned back to her; worry was all over his face.
"Mina," he said, "I don't like what's around that corner."
Mina immediately straightened up, expecting to take off again.
"Nonono… It's not dangerous," he reassured her. She slumped against the wall again. "Well, not really," he amended. She sighed, but didn't move.
"What's around the corner, Doctor?" she asked, trying not to sound exasperated.
"Either a stunningly accurate representation of the room we were in ten minutes ago, or the room we were in ten minutes ago," the Doctor said, turning to peer around the corner again.
"Doctor, you're not making any sense," Mina complained.
"It's this place that's not making sense, not me," the Doctor retorted. "Look at this." He gestured with his hand that she should join him. She did, and cautiously peeked around the corner.
It did look a lot like the room they had been in earlier, only from a different angle. Mina noticed something on the floor.
"Doctor, that's my headband in there… it fell off when we ran," she said. "You've gotten us lost!"
"I have not," the Doctor retorted. "There's something very wrong with the architecture of this building."
"More like the architecture of your head," Mina giggled, earning herself a glare.
The Doctor had opened his mouth to give a drawn-out and probably insulting reply when footsteps echoed from down one of the halls. He contented himself to just mutter "humans" instead, and took off in a random direction. Mina sighed and followed him.
Great. More running.