Windows 8 introduced "Charms" and "App Switching" via four invisible hot corners. Move your mouse to the top-left corner? A thumbnail of a running app would appear. Move it too fast? You'd switch tasks without warning. Move it to the bottom-left? The Start Screen would erupt into existence like a poltergeist.
A skeletal hand that shakes slightly when the user tries to click. Horror Features & Behaviors windows 8 horror edition
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