Falls of any type depend on the person(s) definition of a fall.
For example: A 30 foot fall while roped into a belay system is not the same fall as a 30 foot fall down a cliff where your "fall" may be slowed up by undergrowth etc and you do not suffer any significant injuries and walk away. In other words, your fall was mostly a slide and tumble down.
Another example: If you did indeed free fall 30 feet off a cliff without being slowed on the descent, you may land on fairly soft terrain and walk away. If you are not quite so lucky, a bone fracture may of occurred but you are still in one piece and live another day.
On the other hand, a 30 foot free fall of a cliff onto some rocks at the bottom will probably result in some major injuries if not death.
Again, the definition of the fall must be ascertained and put into perspective when discussing.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.
John Lubbock