In the upward channel one right of the door, jump as high as possible to lure a fast crab moving down the tallest mountain. A crouch jump or breaking spin can be helpful. Damage down the crab while watching it loop around, then ride the crab up the left side. Freeze the crab at the top of the highest peak, stand on it to jump to the left. If you lose the fast crab, it is always possible to get it back by climbing the peak to the right. The crab there can be lured with HiJump alone.