De La Riva starts off showing a knee on tailbone type pass to the guard. This is decent, but left me feeling like you were bound to get caught in a half guard, rather than just cleanly pass the guard. De La Riva then shows a guard pass where you lift up your opponents head to break the guard, bear walk over them, and finish with an achilles! I have yet to decide if this is just plain crazy or crazy enough to work. De La Riva goes back to another variant of the knee on tailbone attack. Same complaint here; I think your opponent would be able to get you in a half guard. He then shows how to get your opponent in a knee bar if they try to counter this pass. De La Riva goes back to show another pass where you grab the back of his head to break the guard. This was my most favorite pass so far, and I feel it far more applicable than the knee on tailbone passes shown.
The material on this tape goes from excellent (the "Sperry" way to pass the guard or how to open someone's guard with the hands behind the head method) to mediocre (the knee on tailbone passes- I like the method that Pedro C. uses on his second series better, BUT he seems to get his legs awful tied up and looked like he could be swept). If you are going to pass a guard in a vale tudo situation, you are MUCH better off passing it standing while punching. De La Riva does not address any half guard passing. This is a good tape on its on, but comes in much more handy as a follow up to Sperry's excellent guard passing tape on his first series.
This instructional DVD set is for sale in the Sherdog Shop for $79.99.