When I was about 35 I wanted to put a wood stove and chimney in the 2 story house I was renting, but only had a short ladder. I used it to climb up onto the 1 story attached shed, then pulled it up and leaned it against the 2nd floor roof, with one ladder leg on each side of the shed peak.
I then proceeded to get up on the 2nd floor roof. I had one leg in it and the other on a rung when the ladder kicked out, and I landed spread eagled, facing down. As I picked up speed I desperately tried to get twisted around so that I would land on my feet but no luck. I came off that roof head first and landed on the frozen driveway. All that I remember was laying there thinking "Holy F@@@, I'm alive!!!!
I don't like heights.