National Geographic teaches you how to shatter a car window with ease

Learn the trick that drunken frat boys have known for years - tossing a shard of spark plug porcelain will easily shatter a car side window. (Via Dooby Brain)

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  1. "Hey, can I borrow your hammer? All I have is this bouncy rubber mallet."

    "Sorry, I'm busy smashing spark plugs. Get your own."

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