Ron and I followed Harry through the piles of lost items while he followed the hissing voice to the Diadem. Of course it isn't so simple, and of all the people we had to run into, it had to be Malfoy, Crabbe and Zabini. Even then I didn't expect Crabbe to be crazy or stupid enough to cast Fiendfyre. Harry grabbed the Diadem and we made a mad dash in the opposite direction.