I had something like this happen - except for the 'fatally' part of course. I was in a canoe race on a cold spring day in cold water. At the beginning of the r

I had something like this happen - except for the 'fatally' part of course. I was in a canoe race on a cold spring day in cold water. At the beginning of the race I ended up jumping into the river in waste deep water. My jeans stayed wet the whole race. My legs were cold wet and immobile for over an hour while my upper body was 'working out' paddling the canoe. All was good until the race ended. I got out of the canoe to walk the 1/2 mile back home. As soon as I started walking I felt the cold blood from my legs rush up to my torso & started seriously shivering. Continuing to walk made it worse. Made it home anyway & collapsed under a hot shower. I felt at the time that if I'd have tried to walk much further I'd have had a real bad day.