|"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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|"Is this all real? Or has this been happening inside my head?"
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Aqua-Lung is a brand of scuba diving gear in the Muggle world. Harry Potter considered summoning an Aqua Lung scuba diving suit from the nearest Muggle village to aid him in the second task of the Triwizard Tournament. Ronald Weasley liked this idea, until Hermione Granger turned it down, due to the fact that they would have to risk Muggles seeing it flying across the countryside, which would break the International Statute of Wizarding Secrecy. The idea was also turned down because it would be unlikely that Harry would be able to learn how to use one in less than one hour.
- Harry Potter and the Goblet of Fire (Mentioned only)