Over in the grandstand the music was pumping, flags were waving and a Korean announcer was cheerfully trying to induce a dance-off. But at the bottom of the course, Cheryl Maas was not happy. “That was,” she said bluntly, “a shitshow.”The Dutch snowboarder, one of the most experienced riding in today’s Olympic slopestyle final, has never been one to mince her words. But even by her own outspoken standards, the verdict was a damning one. “I’m not happy about the contest being run.