Rose Tyler didn't listen. Had she ever mentioned that? The Doctor knew it by then, but it was high time everyone else figured it out. And she proved it by wandering off on her own that morning. What the heck, right? So what if she was relatively small compared to some of her fellow captives? She'd fought off enemies before. Without weapons, even! She was thoughtful, she was resourceful!
She was so screwed if she got snatched up.
But her exploratory nature took over. Mostly because she found that museum stifling. The people were wonderful, there was no question about that. Everyone was in the same boat, and therefore open and inviting. But she couldn't shake that uneasy feeling she had, even around people she knew and loved. Probably a side-effect of being kidnapped, stuffed in a room with a jackass, and then finding out two friends she thought she'd left for dead were very much alive. Figured.
Her first order of business was to return to the 'scene of the crime' so to speak. She had no idea where the mirrored room of red was, but she did know her way back to the thrift store. And if she didn't, the crudely drawn map would tell her. Even if she found no clues...well, it was a store! She was female after all, and a city girl at that. What Rose hadn't expected was to find a young man, barely more than a child, standing in front of it looking forlorn.
Well. Step one, be friendly. "Hi," she offered, coming up beside the boy. "You look..." She was going to say lost. But he definitely looked more than that. "Like you just got your arse kicked."