Would be that all Training / H&S vids were as realistic.
We had a technician fall through a roof skylight very recently and fell 30ft onto a concrete floor.
He's out of hospital now and well on the way to recovery, but it is unlikely he will be able to do anything but a desk job. He is VERY lucky he can even walk since he did shatter his spine.
Perhaps he would have though more about a safety line had he seen a graphic video.