Last week I hit a 60 degree wedge fat. the ball came up slow and my club hit it again during my follow through. I told my buddy that it cost me 2 strokes. He thought one swing was one stroke regardless of how many times the ball was struck. He asked the pro about it and was told it was one stroke for the first hit, one stroke for the second hit on the follow through and it's a one stroke penalty. I didn't know about the penalty stroke.