"Professor Snape, sir?"
"I believe class is over, Potter. Leave." Snape said without looking up from a paper on his desk.
"Excuse me, Professor, but Professor Dumbledore said I might talk to you for a moment." Snape rolled his eyes and finally looked up.
"Talk. You are officially wasting my time," he waited until Harry began speaking to say, "Now."
"Thank you, sir. Professor Dumbledore recommended, when I said that I'd like to get to know a bit more about my parents, that you might share some memories of them with me." Harry didn't even know why he was bothering, but Tom liked a challenge, and charming Severus Snape would certainly be that.
"No. Leave." Snape looked back down at his paper and Harry had to hide back a grin.
"Well, Professor, it's just that the other teachers he recommended all taught them as students, whereas you knew them as peers, and I thought that I might get a more complete picture of them as people if I saw them without teachers around." At this, Snape actually stopped writing and actually looked at Harry, peering into his eyes in a way that made him unconsciously lock down with his Occlumency, forcing thoughts from his mind.