"Albus, what are you doing here?" Professor McGonagall asked instinctively when she saw Dumbledore.
"I just came downstairs to get a cup of hot chocolate. What happened here?" Dumbledore asked, immediately noticing the change in expression on Professor McGonagall's face.
"I heard a strange noise... Oh, and I just found Mr. Creevey. He is most likely... petrified." As she spoke to Dumbledore, Professor McGonagall looked up toward the end of the corridor, as if something was over there.
Chapter 510