The Cloud Mechanic: a worker in a worn canvas jumpsuit and leather harness stands on a scaffolding platform floating in open sky, servicing a cumulus cloud with a wrench and copper tubing. Brass valves and gauges embedded in the cloud's flank; a jet of vapor escaping from a joint. Toolbox open beside them. Utterly matter-of-fact posture, as if routine maintenance. Warm late afternoon light, photorealistic