When I was aged 55ish myself and a friend were building my garage. We had reached the point of putting slates on the roof. On the Friday night I put boards on the scaffolding at gutter height.
My wife went to Scotland to see her father leaving the children in my care. Waking early on the Saturday morning, around 5.00am, I decided to do some work on the garage before the kids woke up. Climbed the ladder on to the scaffolding and walked to the other end, stood on the end of the plank only to discover I had forgotten to secure the plank to the scaffold.
Some time later I came round to find myself laying in the stream which ran alongside the garage.
My main injury was to the left eye, damaging the muscle and nerves which control the opening and closing of the eyelid. It took six months for my eye to open and it still only opens about 75%.