For instance, Smart scroll will scroll the screen based on the angle of your head and Smart pause will stop playing a video when you look away.

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Naismith turned provider and Miller's attempt to head home from a difficult angle at the front post was beaten away by a worried Cesar.

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Heavy make-up or a mask will also work, as will tilting your head at a 15-degree angle, which fools the software into thinking you do not have a face, according to an online guide produced by hacktivist group Anonymous.

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