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The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Bridget Sneyd is executive producer for Twofour. Your Cookie Settings Cookies are very small text files that are stored on your computer when you visit some websites. Finally, the ending of the clip is revealed and the fascinating science behind it explained. The audience is presented with a number of different possible scenarios — along with a montage that provides clues about the end result of the clip.
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