In ‘Black,’ Amitabh Bachchan delivers a performance built on precision and emotional risk. As the driven teacher, he uses sharp movements, sudden stillness, and a voice that cuts, then breaks, to show obsession and care colliding. Later, he changes into a weak person. Aging makeup adds texture and realism, but the real change comes from posture, tremor, and the fading focus in his eyes. He communicates decline through breath, micro-pauses, and hands that no longer obey his intention. He refuses easy sentiment, keeping the character prickly, proud, and human, even as memory slips away, scene by scene, with stark honesty. Fully.