I almost felt like the "Wanderer above the Sea of Fog" in the oil painting by Caspar David Friedrich. That Saturday morning, my partner and I decided to go for our habitual walk, taking our friend's dog with us up the hill bordering the northern side of our hometown. If the walk and the itinerary were just routine, the atmosphere was rather odd and unfamiliar : the town had entirely vanished under a thick blanket of fog. We stood overlooking the valley, as curls of mist licke