Your title caught my eye. I can always appreciate a little Pink Floyd. Love this song. I like how you integrated the lyrics to the situation. Nicely done. Good story and sad.

It's funny I always think of Snape when I hear the lyrics "no dark sarcasm in the class room. Hey! Teacher! Leave them kids alone!"

For Voldemort I think of "we don't need no thought control." and I see that is where you were going. Like I said, nice job.