If said player gets dangerously close to colliding with an object, the safety system would signal an audible warning alert and pause the game.

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"This change to a higher phase of alert is a signal to governments, to ministries of health and other ministries, to the pharm industry and the business community that certain actions now should be taken with increased urgency and at an accelerated pace, " Chan said.

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That system, like most cars equipped with lane departure warning, uses a loud audible signal and a dashboard icon to alert you of the transgression.

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The actuators combined with signal information from the sensors can alert the driver to potential dangers, and help with things like parking or staying within highway lane markings.

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The patent gets even more creative, suggesting customization options similar to how people assign a variety of ring tones for different contacts and whether the incoming signal is a call, text or alert.

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Wherever we went - even to countries of little consequence - presenting our national passport was a signal to immigration and customs officials to be on alert.

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On the other hand, be alert for eating patterns and beliefs that may signal unhealthy behavior, as well as peer pressure that may trigger eating disorders.

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