Rose Tyler: You pulled his arm off!
Doctor: Yep, plastic.
Rose Tyler: Very clever, nice trick. Who are they, students? A student thing?
Doctor: Why would they be students?
Rose Tyler: I don't know!
Doctor: You said it. Why students?
Rose Tyler: 'Cos... to get that many people dressed up and being silly they got to be students.
Doctor: That makes sense. Well done.
Rose Tyler: Thanks.
Doctor: They're not students.