What Happens When You Drop Balls Onto A Moving Escalator

A sackful of rubber balls dropped onto a moving escalator proves quite mesmerising to watch. And highly inconvenient for other people who want to use the stairs.

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For three unsuspecting librarians, it was meant to be a quiet first day on the job. But little did they know that a medieval battle of epic proportions was about to unfold in front of them…

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