In the Rearview, which screens in the Acid sidebar at the Cannes film festival, is a gripping social document, a no-frills portrait of human migration that confines the bulk of the action to the back of the van. It shows us the people and eavesdrops on their chatter. We hear from the elderly farmer’s wife who’s pining for her favourite cow and the middle-aged woman who carries a photo of her grandfather holding a butterfly. “I come from an aristocratic family,” she says sadly. “Now I am just a travelling frog.”