When you hit an explosion shot and leave the ball in the bunker the reason invariably is that you have gone too deep into the sand with your wedge. A sand wedge, because it has a wide flange, should bounce up out of the sand, but when you hit down too deep the sand will grab and hold the club head. There is a way to prevent this. Take, of course, the normal open explosion-shot stance. The face of your sand wedge should also be quite open. Now concentrate on keeping your right hand well underneath its normal position, with the V pointing below your right shoulder. This forces the club face open, and as you come into the ball the club head will be kept on a fairly low trajectory. After impact concentrate on keeping your right hand underneath your left, not rolling it over the left hand and turning the toe in (red arrow) as you normally would. This prevents you from squaring the club face and driving it in too deep.