Downhill challenges refer to skiing events that involve navigating a course of bumps and jumps known as MOGULS. MOGULS are a series of bumps on a ski slope that require the skier to maneuver around them in order to complete the course. The term 'MOGULS' comes from the French word for 'BUMP' or 'HUMP'. Downhill challenges are considered one of the most difficult skiing events, as they require a great deal of skill and agility to navigate the MOGULS successfully.