Not personally, but my brother fell while climbing out of his stand. He was 15 ft up and the first couple steps down were branches, after that he had the "U" shaped screw in tree steps. One of the branches broke and he fell about 5 ft until one of the screw in steps hooked him under the rib cage. He managed to get his foot on the next lower step and pick himself up to dislodge himself, but he ended up with 3 broken ribs and a pretty good scar where the step went in. He came close to puncturing a lung, and needed help getting out of the woods. Its a good idea to carry 2 way radios or a cell phone for just such an accident.