"I’ve got a question about the course aims," said Hermione politely when she was eventually allowed to speak, but Harry was more focussed on the afternoon sun streaming through the window, hitting Umbridge’s right shoulder, and illuminating the dust particles floating whimsically through the air, "There’s nothing in there about using defensive spells," they were stirred into little turbulent spirals and twisters with the movement of the class, and these disturbances in the air gradually spread far from their point of origin until, finally, they resolved into the appearance of gently settling snow once more. The beam of light on Umbridge revealed, however, that the dust in her immediate vicinity, was not behaving in quite the same way.