But I don’t think I’ve ever known such a natural at Potions!” said Slughorn. “Instinctive, you know — like his mother! I’ve only ever taught a few with this kind of ability, I can tell you that, Sybill — why even Severus —” And to Harry’s horror, Slughorn threw out an arm and seemed to scoop Snape out of thin air toward them.

— J.K. Rowling

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