Rose knew better, and was trying to hide it from everyone, even from herself. But today...
The sun was bright, the air was clean, and there was something about the City streets today that made her want to run -- run, the way she used to run, hand clasped in long fingers, laughing all the way (even when there was something chasing them). She missed it. She couldn't bring herself to even think the rest of the thought (she missed him), because missing the running was quite enough.
It could have been the season. The body kept a time all on its own. This would have been around the time of year when she'd last seen The Doctor. Not his copy, and not the older one that came after him, but her Doctor. She didn't want to miss him. She didn't want to even think about him. So she thought about the running, when she admitted to thinking about anything other than the work in front of her at all. She thought about the running.
And that's why she'd frozen between file cabinets, her hands full of hanging manilla folders, as if she'd forgotten why she was standing there at all. How long? She shook herself and opened the file cabinet, riffling through the listings with an elbow.
"One of these days, we should move all these paper files into an electronic format," she said, trying to be cheerful. Her voice was too bright. She screwed on a smile and nudged the first file cabinet closed, then moved to the second to finish filing what was in her arms.