Have you ever pretended to be on your phone when there was actually no one there? Samsung has now made 'Make Fake Calls' a listed feature in their cell phone instruction manual. The idea is to have the phone simulate a fake phone call to "get out of meetings or unwanted conversations."
The website Unpluggd has generated some useful, funny ideas as to when it is appropriate to make fake calls. The most important of all is to be able to fake it well -- no one wants to get caught faking it.