There are several videos on youtube showing SVB's break technique...including my own. I've spent quite a bit of time studying his technique and I can emulate it somewhat. Face it, it takes SVB's superior natural ability to get the most of this relatively complicated technique.
SVB's break can be broken down like this:
1) SVB sets up low over the cue with his feet pretty close to the table and his back hand very "forward" on the cue. Front leg bent, rear leg nearly locked. SVB takes several long, quick practice strokes. The cue is slightly elevated (~5 degrees) and the tip is aimed somewhere around just below center CB. This you will need to experiment with, but you won't be going to extremes either way.
2) Here's where a lot of action occurs...SVB takes a long back stroke and cocks his wrist (watch the videos very closely to see the wrist movement...its subtle).
3) As he completes 2), he begins raising his torso and transitioning his weight forward...think: slide up & forward...smoothly. This is why he stands close to the table (rear foot more forward than typical) and keeps his wrist forward in step 1. This further elevates the cue (to ~10-15 degrees).
4) As he completes 3), SVB begins his strike on the CB. The key component here is that he drops his elbow (substantially) to level out the cue. By moving his body forward he transitions his "forward" hand position to a more "neutral" position (hope that made sense!).
5) As SVB completes his transition into the CB, his back foot is now in a position to push him forward into the shot. If going for low power, his foot will remain locked to the ground. If he wants a little more, he ends up on his tiptoe. For max power, he wil push off and end up with his foot off the ground. He always ends up with his front leg bent quite a bit and his hips nearly flush with the table. Don't forget to snap the wrist thru.
If you watch the vids closely you will see that he may be hitting the table with his cue on the follow-thru...I do when I emulate this break...you should see the nicks in my J&J. You might even subcontiously think you are going to hit your hand on the rail!
It should be noted that his cue position is level thru impact so that early elevated cue aimed at "just below center" is now a level cue aimed "just above center". This slight top spin is what gives him that charactersitic hit/bounce/squat. If you got it all right, the CB (hit just above center) leaves the felt, hits the head ball on the fly or on the first bounce, rebounds up & back (due to the weight of the rack), land roughly between the side pockets, and have just enough top left on it to come to a halt.