Lie down flat with your back on the floor. Place your hands on the ground to your sides for balance; you can pick them up as you get used to the movement. Simultaneously raise your knees and torso so that your knees and face meet on an imaginary line extending from your pelvis to the ceiling. You should be able to kiss your knees at the top of the motion. Your legs will naturally fold, bringing your feet towards your hips, much like a jackknife. Lie back down (i.e. "spread out") and repeat.