In the movie Scrooged, one of the main themes of the show is the airing of a live broadcast of the movie/play "A Christmas Carol".
During the later parts of the live broadcast, Scrooge tossed a coin to a boy in the street to go buy "The biggest goose in all of London". As the camera follows the coin, it is flipping and falling in slow motion.
How would this effect be achieved in a live broadcast, and why would it be done (as opposed to the coin just being shown falling and tumbling as normal)?