Thanks.

Oh, I know...I'm not looking for just one exercise to do. I just like to do the hardest compound exercises first, and then add in the other more specific exercises ("flexion, torsion (twisting), and side flexion"). I get tired of doing simple ab stuff in the gym. There are no machines at my gym that are designed specifically for abs. I've been looking for stuff to spice up the workout...a little variation.