Ski Cross is a free Style Skiing event based on motocross and a cousin sport, Snowboard Cross. Heats of four skiers combine Freestyle and Alpine skills to travel down a rugged technical course with many features (hills, turns, jumps etc.) adapted from those used in a Snowboard Cross. The race requires skill, strength, and physical endurance because of the demands of the course. The course is punctuated by sharp turns, moguls, and jumps, and touching another skier means instant disqualification.