Down onstage, some local preacher was doing his opening act. Part of his warm-up was to get the audience hyperventilated. Loud singing does the job. Or chanting. According to the agent, when people shout this way or sing “Amazing Grace” at the top of their lungs, they breathe too much. People’s blood should be acid. When they hyperventilate the carbon dioxide level of their blood drops, and their blood become alkaline. “Respiratory alkalosis,” he says. People get light-headed. People fall down with their ears ringing, their fingers and toes go numb, they get chest pains, they sweat. This is
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