When I first read the post, I thought he committed suicide (rereading I realized it was an accident).
It brought to mind another guy who could fit into this category: Wallace Hume Carothers, the inventor of Nylon and Neoprene. He battled severe bouts of depression and used to keep a cyanide capsule on his watch chain so he would always be prepared in case he felt the need to end it all. One day he checked into a Wilmington, DE hotel and took it. He was once quoted as saying, "Nylon and Neoprene.. I suppose that's enough for a life's work." Chilling....