After weeks of living in the 18th century, going everywhere on foot and encountering few other souls, I drove to Marseille for a hospital appointment and got stuck in a crazy traffic jam. As a reintroduction to the human race, it was a brutal shock. Hooting, shouting, sirens, blue lights, motorcyclists doing wheelies, cars mounting pavements and grass verges, cars forcing a path through the stationary traffic using their bumpers as buffers: utter chaos.