A Practical Joke where people are wound-up on hidden camera for entertainment purposes. Can be done with celebrities or members of the public. There's usually the inevitable reveal. Swearing may occur at this point. This stuff isn't just confined to television since radio has done its fair share; in fact, Candid Camera was originally a show called Candid Microphone. Radio has the advantage in that everyone in the world is already set up with an audio device at home; i.e., the telephone. Often a Real Life form of False Crucible.