I squinted at him but decided to drop the subject as Fred and George sat down next to me, talking loudly. I spent the rest of the day with the twins running around the castle, dropping dung bombs and me occasionally tripping up the steps. That night though I stayed in the common room, telling them that I wanted to finish up some work. Finally, when I was the only one left in the room, Harry and Ron came down with the invisibility cloak. All three of us got under it and left the common room in search of the mirror.