Innovative Advertising

This might be old news to some people, but I love discovering innovative forms of advertising.  Last year, Amnesty International installed an anti-domestic abuse ad fixture in a Germany bus stop.  The tag line is "It happens when nobody is watching." - and the ad portrays just that.  When the viewer looks directly at the ad it looks like a happy couple, smiling for the camera.  But when they look away, the image changes into the man just about to hit the woman.

Although shocking, it definitely gets the point across.  Powerful.