Boundless ambition is nothing new at the movies, of course. But occasionally, a project can still come along with the scope and chutzpah to throw the audience for a loop. Human Flow, the staggeringly gargantuan look at the global refugee crisis from Chinese director and activist Ai Weiwei, takes a subject that could consume a documentarian’s entire career and seemingly attempts to get it all in one go. While the constant stream of jaw-dropping imagery can sometimes feel like a case of Too Much Information, the sheer macro power of the visuals packs a wallop. by Andrew Wright