The PGA of Australia have slowly been adding some great instructional videos on their YouTube page and Kurt Stegbauer’s clips on bunker shots are very good.
The first clip deals with stance and correct weight distribution, the second (below) looks at the clubhouse position relative to the golf ball. In the last one, Kurt a very unique (porcine) way of thinking about how to play a bunker shot. We may need another analogy for vegetarian golfers.
Check out all the videos at the PGA of Australia YouTube page.