沉默

沉 = 冗 + 氵 : Charlie Chaplin is experimenting with superfluous liquid helium and a bottle of water just inside the encampment's kitchen. He lets the water flow into the liquid helium, and because the water is frozen instantly, it sinks and submerges.

默 = 犬 + 黑 : Mahatma Gandhi (m) and the Saint Bernhard dog (犬) are training hard in the observatory's bathroom (o4). They are taking turns of making awful noises on a blackboard (黑), and they train to remain silent (默) instead of screaming out loud.