Sometimes there is one "top-level" story, a framing device, which leads into the various "sub-stories", as in Dead of Night and The Illustrated Man. The former helped to popularise the format for horror films (though they had existed as far back as Unheimliche Geschichten (1919)), and British company Amicus made several such films in the 1960s and 1970s. Another variation is when different sub-narratives share a common incident (usually a turning point), as in Amores perros.
Recently in Bollywood similar trend is being started by Ram Gopal Varma. First "Darna Mana Hai" and then "Darna Zaroori Hai", he is planning to make more films with same theme.
See also
Categories: Film genres