Mike Malaska talks about how throwing is an integral part of many sports, like baseball, softball, and football.
He uses an analogy of throwing and skipping a rock. Even though skipping a rock is not a sport, the principles of throwing something do apply.
Skipping a rock will help you with hitting a golf shot and how to use the club. When you skip a rock, you want the rock slightly tilted upwards, so
when the rock hits the water, it will skip and bounce across. If the axis of the rock is tilted down, it will just hit the water and sink.
Take this same action and think of the clubface as the rock; your hand is essentially skipping the rock. The club skips through the sand.
On normal lies, the back of the club is the edge of the rock, and you are trying to use the sand wedge the same way as skipping a rock.
The rock skips off the water, and the club skips off the sand. They are pretty much the same motion.