Rose feels a hand on hers, and she snaps her eyes open and sees a goofy man. "Run," he tells her. He jerks her sideways, and the dummy's hand hits a pipe, releasing steam. Rose and the guy run, and the dummies, in their various half-suits of clothes, stumble after. Some of the extras are more intense and into this than others, and their walking is quite varied. A dummy behind a grate woggles its arms at Rose and her companion through the bars as they pass, ridiculously but also scarily. The Doctor pulls Rose into an elevator, and the doors close on one of the dummies' arms. The Doctor pulls once, twice, several times, and it finally comes off in his hands, and the doors close. Rose is shocked, somehow, by the arm-pulling-off. The Doctor tosses it to her with a grin, pointing out that it's just plastic. She's still not convinced about all this: "Nice trick! Who were they then, students?" The Doctor cocks his head at her and asks why that would be, and she responds using Occam's Razor: "To get that many people dressed up and being silly, they've gotta be students." Or, you know, Groundlings. To watch movies and TV, there's not actually a difference between Groundlings and British students anyway. Have you seen Hex? Even the dead students are wisenheimers. If I can get through that show with my adoration intact, I can handle anything this show throws at me. The Doctor grins and congratulates Rose on her logic skills, but she's wrong. Rose: "Whoever they are, when Wilson finds them, he's gonna call the police." But Wilson's dead. Poor Wilson. Rose fails to see the humor in the joke, if electricians die as a result. The Doctor moves her out of the way and sonic screwdrivers the lift so the guys can't follow.