A woman walked through New York's Bryant Park wearing four iPads, creating a three-dimensional video image of her head. Dubbed "iPad Head Girl," the woman strolled through the park before stopping to read a book.

In a YouTube video of the scene, viewable below, the pretty model in the headgear watches confused on lookers staring at her. She also smiles, blinks and does everything that a real person does with their face.

The stunt was a guerrilla marketing campaign for Hearst Corporation's new "Cosmo for Guys" iPad application, which is a digital edition of Cosmopolitan magazine geared toward men. Anyone who touched the model's "face" during her walk would be directed to sample pages from the magazine.

But how did she do it? Apparently, video was prerecorded from four angles around, then played played back as the model walked.

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