Neville hissed like someone had poured lime juice into an open wound in his eye. The room around them seemed to vibrate with anger, and markings on the floor - which Hermione hadn't been able to see in the darkness - flared violently in vivid colours of reds and blues and purples. Even Lily spat viciously as the name of the most reviled wizard in Harry Potter's world echoed around them. Hermione could do little but blink in her shock.