[header] How to do a scissors twist with an exercise ball [title] Put your exercise ball in an open space. [step] Make sure there's nothing nearby that could distract or hurt you as you exercise. [title] Lie down on your back with one of your legs on top of the ball and the other right next to it on the ground. 
[step] Prop yourself up slightly on your elbows so that you're looking at the ball, with your hands pressed palm-down to the ground. [title] Squeeze the ball between your lower legs/ankles and lift it up from the ground.