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This Ingenious Subway Ad Activates When the Train Arrives

Hair-raising.
relates to This Ingenious Subway Ad Activates When the Train Arrives
Apotek/Vimeo

Last November, British Airways unveiled billboards that interact with airplanes. Now, Swedish pharmacy chain Apotek has come up with some creepily-awesome subway ads that respond to incoming trains.

To promote a new line of hair products, Apotek snuck ultrasonic sensors into digital screens on a Stockholm subway platform. The sensors monitor the train's arrival, ensuring that the model's luscious tresses are blown away each time the train pulls in.