It was shortly after my fortieth birthday and I was helping a friend in his woods. The very first tree I sawed through began to fall beautifully and then, unseen by me, broke in the middle. The friend saw it happening and shouted a warning but with a revving chain saw and ear defenders on I heard nothing. The top caught me a beauty and landed right on my head. It was lucky that I was wearing a helmet as even then I was knocked to the floor and had a sore neck for a few days.