I would love to know this, my SS/PP dvd is giving me fits during the pullovers on the ball in SS. It just skips them, after I finish the plie squats and we put the bar off to the side, there is a pause and then we start the chest flyes. The first 2 times I viewed the workout there were pullovers in the middle there! I am not thinking it is a problem with the dvd (as in an SNM problem) but if that is where the layer switch is, it would help me on my quest to fix it. I tried it in both of my dvd players, the other one actually stops and says cannot read disc when it gets to that point. Very odd, and since it worked 2x before I know it has to be something weird on my end!