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When people are deeply “in” a film, you’ll notice that nobody coughs at certain moments, even though they may have a cold. If the coughing were purely autonomic response to smoke or congestion, it would be randomly constant, no matter what was happening on screen. But the audience holds back at certain moments, and I’m suggesting blinking is something like coughing in this sense. There is a famous live recording of pianist Sviatoslav Richter playing Musorgsky’s Pictures at an Exhibition during a flu epidemic in Bulgaria many years ago. It is just as plain as day what’s going on: While he was playing certain passages, no one coughed. At those moments, he was able to suppress, with his artistry, the coughing impulse of 1,500 sick people.
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