"Remarkable," said Tim Goebel, the first skater to land three quadruple jumps in a program.
"To master so many different takeoffs, that's where the hat comes off," said four-time world champion Kurt Browning, the first to land a quadruple jump in competition.
"Amazing. Amazing," said 1988 Olympic champion Brian Boitano, the first to land all six types of triple jumps in a competition.
"Welcome to the future," said 1984 Olympic champion Scott Hamilton.
"This is crazy...quite extroaordinary...staggering," British Eurosport's Simon Reed told his TV audience.
Such was the reaction from some of figure skating's most accomplished champions and a veteran commentator to what they had seen Nathan Chen do in the free skate at last week's Grand Prix Final in Marseille, France.
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