DH reread CH 30

[dumbledore11214]

No: HPFGUIDX 187448

"Professor McGonagall rose to her feet, pointed her wand at the groggy Death Eater and said 'Imperio.'
Amycus got up, walked over to his sister, picked up her wand, then shuffled obediently to Professor McGonagall and handled it over along with his own. Then he lay down on the floor beside Alecto" - p.478

Alla:

I am going to ask a question, which I suspect belongs to the "I missed something really obvious" type, but hey, I will ask it anyway.

When one says "Imperio" it causes the subject to do anything caster wants, right? But doesn't caster also need to speak this specific order as well? I really am annoyed that I cannot check my GoF now, but doesn't Harry when Fake!Moody teaches them Imperio hears the voice in his head saying Jump? And he tries to resist it, etc?

Or are we to assume that Minerva casted nonverbal specific command? On the other hand Harry in the Gringott also does not say specific command, just Imperio? Is magic which forms this spell just adjusts itself to make sure the subject does whatever caster wants without speaking the specific command? Does the magic just know?


"Professor McGonagall moved faster than Harry could have believed: her wand slashed through the air and for a split second Harry thought that Snape must crumble, unconscious, but the swiftness of his Shield Charm was such that McGonagall was thrown off balance" - p.481, brit.ed.


Alla:

How does Harry know what Minerva is casting here? That he expects that Snape must crumble, unconscious? Is it just due to what sort of wand movements he sees (slashing equals attack?) or something else?

I just was under impression that not only he knew that she was attacking, but he also figured specific charm or curse, maybe I was wrong.

"I can act from here," said Flitwick, and although he could barely see out of it, he pointed his wand through the smashed window and started muttering incantations of great complexity. Harry heard a weird rushing noise, as though Flitwick had unleashed the power of wind into the grounds." - p.483


Alla:

Flitwick strengthens the Hogwarts protective charms here, yes? Why is the remark that he could barely see? How is it important for him to see? I mean it is not like target of his incantation is portrayed somewhere?