A fellow pilot in the area was on final on a local grass strip when a high school student, (principal's son) hit a golf ball from the golf course that is in the flight pattern, that went through the windshield and hit the head of this pilot, causing a cut and bleeding. He did land immediately and safely. This is in the records as an,"accident/incident" from the hangar section of the club's. I think the only repair was a new windshield. No other damage if I recall.