I'm not quite sure if this is really a "sailing related injury" but, in the early eighty's when we were building and selling one a day 4.3 Sundance cats (4.3m long, 6'8" beam, standard as sloop rigged, sailed one up on trapeze), a guy in his late fifties walked into our workshop, spent 2 hours telling us about how his wife had just divorced him and taken him to the cleaners and that he would be "better off dead", and went out the door with a new Sundance in tow. I arranged to meet him at a local beach that afternoon and run through the rigging and sailing of the boat with him. This all went well and he had a real blast for about an hour and a half then came to shore with big round glassy eyes and a smile from ear to ear. A half an hour later with his cat packed up and hooked onto his car he dropped dead from a massive heart attack. Shocked the hell out of me but my oldest son who was there with us said "at least he was happy when he went"!!!