Wrecking 14 Cars in One Scene
They had to ruin 14 Ford Anglias for the perfect shot when Harry and Ron crashed in the Whomping Willow when filming the Whomping Willow sequence.
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Dumbledore’s Telescope
One of the most expensive props was Dumbledore’s telescope. The telescope is engraved with the signs of the zodiac and was one of the most expensive props used during filming.