I am 68.
I fell wearing a TraumaVoid EQ3. At a walk.
6 yr. old OTTB, first nippy morning, he had not been turned out yet, the other horses started running, then an 18 hand OTTB came charging down right outside the arena fence, and the OTTB I was riding, at a walk, sort of elevated himself into the air, gave a back shimmy, and off I went into deep sand.
My head was fine, and my very problematic neck was fine. My riding teacher checked me out some and saw no signs of brain involvement, I was not dizzy, no double vision, and both sides of my body worked fine.
I did crack two ribs though in spite of wearing a safety vest.
I am glad I was wearing my new helmet!