The woman drew a wand from the sleeve of her robe, pointed it at the desk behind her and before the classes very eyes the desk changed into a pig. Hermione couldn't help but smile, she knew she probably had the biggest grin on her face ever. was left speechless, she could see the surprise in her roommate's eyes. What was more amazing is she had done so without saying anything. The pig changed back into the desk and McGonagal seemed to draw everyone's attention to her without saying a single word.