Cinema history is a strange thing. A couple of months ago the Guardian began a series in which film critics write about ‘the classic film I’ve never seen’, some admitting to have unaccountably avoided exposure to genuine masterpieces such as Metropolis (1927) or À Bout de Souffle (1960). Others have revealed they have yet to sample undemanding box-office hits such as Top Gun (1986) or Titanic (1997).