New Zealand's final representative, Janina Kuzma took a fall in the second half of her run and finished 10th of the 12 finalists.
Japan's Ayana Onozuka, who had been second in qualifying, also fell and finished 11th.
Finn Antti-Jussi Kemppainen (crrt) showed why he's rated among the bright young racers with victory in the men's final.
Kemppainen, ranked 19th in halfpipe and 14th overall in freeskiing, was fourth best in qualifying but his 86.6 was good enough to edge out American 17-year-old Aaron Blunck's 83.8. Another American, Taylor Seaton, took third in 79.4.
''I didn't really expect anything this cool but it's definitely a good start for the season," Kemppainen said.
New Zealand's Lyndon Sheehan, delighted to produce the second best score in qualifying, finished fourth on a 76.4 while top qualifier, Canadian Mike Riddle, tumbled to ninth.
New Zealand's other entry, Beau-James Wells, put off by a wind gust, took a fall and finished 11th.
Snowboarders, including the sport's highest profile athlete, American Shaun White, make their entry to the Games on Sunday with qualifying in the World Cup slopestyle event; the men's FIS giant slalom is at Coronet Peak; and the curling competition begins in Naseby.
WINTER GAMES
WORLD CUP HALFPIPE
(Cardrona)
Finals (one run only)
Men:A-J. Kemppainen (Finland) 86.6 1, A. Blunck (US) 83.8 2, T. Seaton (US) 79.4 3, L. Sheehan (NZ) 76.4 4, A. Ferreira (US) 71.0 5. Also: B-J. Wells (NZ) 22.0 11.
Women: D. Logan (US) 84.6 1, A. Vanlaanen (US) 80.0 2, M. Jaeger (Switzerland) 74.8 3, K. Aerts (Belgium) 65.2 4, A. Drew (US) 65.0 5. Also: J. Kuzma (NZ) 47.8 10.