It begins with a touch of brio: a sinuous, swirling tracking shot plunges deep into the daily chaos of a market place in a remote Algerian desert village. Signs are hoisted aloft and askew, mobile phones noisily bickered over, clapped-out bangers pushed out of the way. Eventually, the camera pauses on three old men as they, as one, clasp their handkerchiefs to their noses: a honking wedding cortege is about to roar past in a miniature dust-storm to set the seal on the mayhem.