I am probably a little late to the party on this one, but the suspension fallout has become one of my favorite anti-extension core exercises. I have started to use it a little later in our anti-extension progression. We start with typical front plank work (regular, feet elevated, weighted feet elevated), progress into a swiss ball rollout, then the suspension fallout followed by a body saw. The movement is very simple but it is also a lot tougher then you may initially think.
Give it a try. Enjoy!