I hate it when people review DVDs without ever spending time working on the material first. So I've spent some time working this DVD into my game. And here's my review of this dvd. Budovideos.com - Unstoppable: Secrets of the Hook Flip DVD with Carlos Machado This DVD is epic. The hook sweep is the best sweep in BJJ, far and away my favorite. If you aren't aware of its glory, be aware. Much like certain throws in judo, if you get your grips, the sweep is a done deal. The problem, however, is that the hook sweep is something you can spend years improving. Like a good uchimata. This DVD basically consists of an incredibly knowledgeable hook sweep expert giving black belts advice on how to perfect the hook sweep. And just the hook sweep. There are almost no entries, and no real variations. No subs. Just perfect execution of the hook sweep, using different grips and subtle variations on positioning. The DVD consists of a seminar that Carlos Machado is giving to several black belts. It is well-edited into different chapters, and the video quality is good. As background, it is assumed you are already knowledgeable about how to correctly execute a pretty good hook sweep. So it isn't that useful to beginners. But to anybody who loves the hook sweep, it's invaluable. I can only wish there were other instructionals like this, devoted to perfecting a single move. I guess Ryan Hall's "Triangle" is somewhat similar. But even that has a lot of variations and setups. What's beautiful about this setup is that it forgoes such frippery, and focuses on perfecting a simple, basic move to an incredible level. Finally, it's cheap. Awesome.