Pretty fun to try and scratch the surface of all the variables on a slalom run outside the skiers performance: Ski Shape, Ski Material, Ski Flex, Ski Weight, Fin, Fin Adjustment, Binding Type, Binding Adjustment, Boat, Boat Speed, Boat Path, Boat Weight / Balance, Water Temp, Water Chemistry / Salinity, Water Depth, Shore Shape, Water Surface Conditions, Wind Direction, Wind Resistance of Gear (or haircut if your @MarcusBrown).
All cumulatively important; what keeps the ski industry in business and fun to geek out on, but probably nothing more important than the skiers skill / performance.