“Someone said it’s very difficult to define, this movie. For me, that is the biggest praise.” South Korean filmmaker Bong Joon-ho is speaking of his latest project, but such a query of genre and tonal classification could easily be applied to most of his prior features as a director – from debut Barking Dogs Never Bite to Memories of Murder, The Host, Mother and Snowpiercer. With pretty much all of them, you think you know what you’re going to get based on a glance at the plot synopsis, only for a considerably different beast to emerge during viewing; sometimes multiple different beasts…