Q freezes for an instant, stunned. He recovers and gestures to the formidable-looking woman at the bar to refill Lucius' glass. "Er, yes," he says, handing the glass to Lucius. "I mean, I'm him. He's me." He takes a deep breath. "I used to teach at Hogwarts. About seventeen years ago." He rubs the back of his head. "Sorry, I've...been in an accident and I've got some gaps in my memory. Have we met before?" He grabs his mug of stout and drains it.