From Matt:
“My wife’s ball was plugged in the face of a bunker. She took a mighty cut, the ball popped out lazily and almost straight up in the air. Her club followed through and hit the ball once again at shoulder level, knocking it down the hill behind her. It was quite the double hit.
“Just two strokes or a penalty?”
Rule 14-4: Striking the Ball More than Once
“If a player’s club strikes the ball more than once in the course of a stroke, the player must count the stroke and add a penalty stroke, making two strokes in all.”