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Scherbaum's feats are so amazing that doctors (including a lung specialist, a brain specialist and a radiologist) at the University of Basel once wired him with a battery of instruments to see what happened to him when he blew a C above high C. Their conclusion: although the air pressure inside Scherbaum was higher than that of the average automobile tire (24 Ibs. per sq. in.), he was doing himself no noticeable harm. The source of his power, says Scherbaum, is "diaphragm and abdominal muscles," plus "a secret" that he will not reveal. Whatever that secret is, U.S. audiences will have a chance to judge it for themselves next winter: Scherbaum will tour the U.S. with the North German Radio Orchestra—presumably blowing a Brandenburg Second to end them all.