There are some discs that make it mandatory to watch something first. One example that kills me is the 2-3 minute long schpeal that plays in front of "Elmo's World" DVDs telling us about all the great things Seasame Street does around the world. On some discs, you can fast forward (not skip). On others, it is mandatory to watch the entire thing. This does pose a bit of a problem when your toddler needs his Elmo's World fix and you have to sit and wait...