Around 25 years ago a friend of mine almost fell out of a treestand about 35' up a tree in his yard. I say almost because he did fall, however, his feet got hung up in the stand and that's probably the only thing that saved his life.
He was trimming limbs on a tree with a chain saw, without a safety harness, and the saw kicked and he lost his balance and fell backwards. As stated above, his feet got hung up in the stand and he ended up hanging upside down.
They called the fire department and a ladder truck was sent to his home. Unfortunately, the ladder truck's ladder was too short to reach him. The fire department started calling around and found a truck that had a ladder that would go to 45'.
By the time they located the second ladder truck and it got to his home and got him down he had hung upside down for 45 minutes. He was in pretty bad shape for the rest of his life, especially after he started having strokes and then it transitioned into dimentia. He died several years ago.
Bill