Alistair stood at the entrance of the Potions Office, blocking Snape's path.
He leaned close to Snape's face, looking straight into his eyes with a concerned tone: "Severus, what on earth has gotten into you these past few days?"
The distance was so close that a flash of panic crossed Snape's eyes. He took a step back and forced a stern look, saying, "That's none of your business."
Chapter 179