For me it was reading the riddle of the sands and about 20 years ago I passed on the chance to do a leg of the round the world yacht race - I was worried about

For me it was reading the riddle of the sands and about 20 years ago I passed on the chance to do a leg of the round the world yacht race - I was worried about my existing medical condition meaning I would need a medicvac and spoil the race for the others.