Many of my students are avid golfers. Sometimes there are golf outings on the weekends with co-workers and I hear about their golf events in English class. I've never played golf but I have seen it on television.
A hole-in-one is pretty rare in a golf game and elsewhere the golfer who makes a hole-in-one might win a prize for it or at least get some free drinks after the game. Sounds kind of crazy, but in Japan, the golfer who makes a hole in one is obligated to have a big party and give away prizes or gifts! For that reason, golfers buy hole-in-one insurance.
One of my students had this insurance policy when he made a hole-in-one and was glad that he did. He said the insurance is not that expensive because it is unlikely that the insurance company will have to pay out, but very handy to have in case the golfer does make a hole-in-one.