On a training day in Aspen, Holland reaches the "rhythm section" of a course, in which a racer grabs air on two "rollers," or small hills. Staying compact and aerodyanmic is key to keeping one's momentum during a race. "It's one of my favorite parts [of snowboard] cross," says Holland. "If you hit [the rollers] just right, all goes really well. If you screw up, you pay the piper."