Rack your brains, that should only take a couple of seconds.

Imperfect understanding is often more dangerous than ignorance.

I have gone temporarily deaf and haven't any idea what you said, Harry.

I heard from my dear friend Tiberius Ogden, that you can produce a Patronus? For a bonus point...? Harry raised his wand, looked directly at Umbridge, and imagined her being sacked. Expecto Patronum! The silver stag erupted from the end of his wand and cantered the length of the hall.

Ooh, you look much tastier than Crabbe and Goyle, Harry" said Hermione, before catching sight of Ron's raised eyebrows, blushing slightly and saying "oh you know what I mean - Goyle's Potion looked like bogies.

And sure enough, in seeking to become superhuman this foolhardy young man renders himself inhuman. The heart that he has locked away slowly shrivels and grows hair, symbolising his own descent to beasthood.

It is the unknown we fear when we look upon death and darkness, nothing more.