Static macro shot, cinematic realistic live-action, one continuous shot, no cuts, no camera movement. Keep the radiator, the small chrome air valve, the key, the hand and the white enamel mug exactly as in the first frame.
0.0-2.0 s: the hand slowly turns the small key in the air valve a quarter turn counter-clockwise.
2.0-5.0 s: with a soft hiss, fine sputtering droplets and air bubbles start ...
