Sean Connery turned down the role of Gandalf in Lord of the Rings because he didn't understand the script.
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There's a children's book titled "Where Willy Went" detailing the adventures of a sperm.
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In 1974, prankster Porky Bickar was so into April Fools, he flew hundreds of tires into a dormant volcano in Alaska and set them on fire - fooling the local populace and coast guard into thinking the volcano was active.
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