Another famous [Folgers] advertising campaign from the early 1980s took the viewer inside various gourmet restaurants as a voice-over whispered, “We are here at (insert name of four-star restaurant), where we’ve secretly replaced the fine coffee they usually serve with Folgers Crystals. Let’s see if anyone can tell the difference!” Of course, no one ever did.
A hidden camera is a still or video camera used to film people without their knowledge. The camera is “hidden” because it is either not visible to the subject being filmed, or is disguised as another object. Hidden cameras have become popular for household surveillance, and can be built into common household objects such as smoke detectors, clock radios, motion detectors, ball caps, plants, and cellphones. Hidden cameras may also be used commercially or industrially as security cameras.