A guy showed me a punch shot at the weekend with a driver, ball position way back, its like a normal backswing but keeping the hands going through and stopping them instead of finishing, worked a treat but must have looked awful - could be useful in the wind, it beat the hell out of my normal swing - I might use it all the time ! how can this be better than a full swing ? bizarre.
It's a useful shot to have in your bag, for windy conditions and tight fairways, but you might find that with the wind behind or none at all, you hit further with a normal swing.