TWO MANITOBA snowmobilers were hurt yesterday in separate accidents during races at Canada Olympic Park in Calgary. Jamie Ansceuw of Oak Bluff suffered a serious back injury when he lost control of his snowmobile and was thrown during a qualifying heat, organizers said in a release. Anseeuw, 40, was rushed to Foothills Hospital in Calgary. Later, Todd Peterkin of Woodlands sustained serious back injuries while trying to negotiate one of the course's jumps. The 30-year-old was also taken to Foothills Hospital.