Harry, Ron, and Hermione Disarm Severus Snape

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Harry Potter, Ron Weasley, and Hermione Granger simultaneously cast the Disarming Charm, knocking Severus Snape unconscious as he attempts to capture Sirius Black and Remus Lupin. The trio, overwhelmed by the situation, realize that they have attacked a teacher, causing Hermione to panic. Lupin thanks Harry, but Harry remains uncertain whether he did the right thing.