Eight months ago, a Swedish interactive billboard went viral. Now another advertiser is using the billboard idea to do more than sell shampoo.
In the previous ad, Apotek, a pharmacy brand, outfitted subway platform ads in Stockholm with ultra-sonic sensors that discerned when a train was coming. The ad featured a model with a lush mane, and when the train came, her hair flapped in the wind as she struggled to keep it in place.
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The new version starts out the same way, but reveals a surprise pitch at the end: