 Mockumentaries are often presented as historical documentaries, with B roll and talking heads discussing past events, or as "cinéma vérité" pieces following people as they go through various events.Examples emerged during the 1950s when archival film footage became available.A very early example was a short piece on the "Swiss Spaghetti Harvest" that appeared as an April Fools' prank on the British television program "Panorama" in 1957.