Nerves struck Harry about halfway down to the entrance hall, and he stumbled slightly down the stairs before catching himself. Ron was too busy looking at his own feet to notice, but Harry felt his face start turning red with embarrassment anyway. He was starting to freak out as he got nearer to the Ball and by extension, Cho. All sorts of things ran through his mind. Would Cho know how to dance? Would she laugh at him if he messed up? Would she even show up?