Owen Hart
Hart died on the night of May 23, 1999, while performing a stunt which involved him being lowered to the ring from the rafters, the cape he was wearing with his Blue Blazer gimmick got stuck in the release hatch of the cord he was trying to yank it out but when he did the release hatch released and he fell 78 feet down into the ring landing on the top rope (this happened during the 1999 Over the Edge.)