Skateboarding is a tough sport, with grueling tricks like kick flips, grinds and manuals — so it’s no wonder Ryan Sheckler has signed on as a Got Milk? spokesman. In order for him to soar as high on the ramp and get the best air, Ryan needs to work hard and train, and adding a glass of milk to his athlete diet helps — especially when it comes to building strong bones that could break while boarding. Check out OK!’s exclusive behind the scene pics and video of Ryan shooting his Got Milk? ad.