Simple question: how do you sustain a documentary about one guy accidentally buying another guy's mummified leg at feature length?
Simple answer: you remember that they're both humans, and treat them like it, and never let go of that, no matter how easy it would be to go the other way.
Well structured narratively, if tentatively/arbitrarily assembled on a shot-by-shot basis, betraying a patchwork shooting style. Begins to flag in the home stretch, perhaps slightly overreaching for its emotional payoff. These are minor complaints. I can give it no higher reward than this: the NZIFF catalogue was waiting for us after the film, and even though I've been obsessively anticipating it for months, it completely left my head during the screening.