"I like to put my put my poles behind my back, and pull my hips up and forward," says professional skier Marcus Caston. "This puts you in a great athletic position for skiing the bumps."If you want more help on how to ski the bumps, look no further. SKI Magazine teamed up with Marcus Caston and the Professional Ski Instructors of America (PSIA) to design the online course “How to Ski Bumps” to give intermediate to expert skiers the skills, tactics and technique they need to crush moguls. Enroll and get in-depth, step-by-step instruction from Michael Rogan and professional skier Marcus Caston to help you break through in your ability to ski—and enjoy—skiing’s toughest terrain. Learn more at aimadventureu.com.