|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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- "Usefull for some potions, including Shrinking Solution."
In 1993, Neville Longbottom added too many rat spleens and too much leech juice into his Shrinking Solution, making it poisonous. Hermione Granger helped Neville fix the potion before Professor Snape had a chance to test it on Neville's toad, Trevor.