I cannot remember from what instructional video this came from, or from what book, but I do recall someone reputable saying the harder you hit the rack, the lower the one ball goes on the side rail.
Also when watching Shane break, you notice that the cue ball gets airborn on every hard break. Perhaps he is intentionally doing this to get out of the way of the one ball heading back down table.
Which brings up another point, the more towards the center of the table you break from, the more the one ball tends to come back towards you and less to the side. This is why SVB breaks close to center and gets the one ball close to the corner pockets rather than flying into the side rail.
Hope this helps.
Also when watching Shane break, you notice that the cue ball gets airborn on every hard break. Perhaps he is intentionally doing this to get out of the way of the one ball heading back down table.
Which brings up another point, the more towards the center of the table you break from, the more the one ball tends to come back towards you and less to the side. This is why SVB breaks close to center and gets the one ball close to the corner pockets rather than flying into the side rail.
Hope this helps.