I was at the top of Autzen stadium during a Dead show... the real ones...when a guy fell down and hit his head. Hard. It’s just part of the concert experience.
Saw a guy fall from the upper deck at Cleveland Municipal Stadium at a concert. Heard later he was paralyzed.
The Dead (the real ones) put on a free concert next to the Willamette in Eugene one day while I was at U of O, I think it was 1974 or 1975. It was a nice day, so I went for a bicycle ride instead. Never went to a Dead show anywhere else, either.