Print advertising may be a bit passé as a medium, but that doesn't mean that clever advertisers can't have some fun within the confines of a declining channel of communication.
At least you could make the case that Ford and Israeli ad agency BBR Saatchi & Saatchi are still experimenting with the form. In this ad, the agency and client tap an optical illusion that's more than 100 years old to create an "interactive" print ad.
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Try it yourself. If you stare at the black dot in the third car on the right for 30 seconds or more then your eyes will create a black car that you can "park" between the other two.
How is this possible? The visual appears to be a riff on the Hermann Grid Illusion, in which the eye creates small grey blobs on the corner of each black square:
