Sorry to hear about your mate, it doesn't have to be a great height to do a lot of damage. However, ladders are not dangerous, they are a tool, and falls are normally avoidable if you work safely and think what you're doing.
We'll not be doing any ladder work today, wind has been gusting here all night,
Just got up to see next doors guttering lying in their front garden!! Saying that it was fitted by a couple of irish blokes in a plain white van who came knocking on doors last year offering to replace gutters and fascias..........never to be seen again!