Ariadne didn't think of much else besides future events when she looked at the crystal ball, but some students had already mentioned that. Another thing that popped into her head was a worthless piece of information she had read somewhere. 'Sybill Trelawney had used crystal balls to fight against Death Eaters in the Battle of Hogwarts.' Wait? Did she just say that out loud?!? Ooops...'Er-I read that somewhere...but we're probably using the crystal ball to interpret the future, right?' the firstie tried to cover up and ended up blushing.