A few summers back, Lynne Shore, an Olympic gold medalist in the 470 at the 1988 games, was racing her Laser in breezy conditions off Hyannis, Massachusetts. She bore off around the weather mark and started surfing downwind. Close ahead, a fellow competitor who was sailing upwind abruptly tacked right in front of her. Fully planing, with no time or space to avoid a collision, Shore could do little but minimize the impact as best she could. "I knew that if I didn't, my boat would probably have killed [my competitor]," she says. She ended up taking the brunt of the impact when the boats collided, when she was first struck on the left side of her head by her own boom and then on the right side by the other boat's boom. Dazed by the impact, she eventually righted her boat and, with the assistance of safety boats, made it to the beach, where an ambulance was waiting. She was diagnosed with a massive subdermal hematoma and a severe concussion. "I didn't go to work for over a week," she says. It took almost a year to recover from the accident. "Now, I always wear a helmet when the wind is over 12 to 15 [knots]."