Currently reading the long Robin Williams biography, "Robin," and there's a guy who got into the self-checkout line but had dealt with pain and depression his whole life. Turns out his diagnosis of Parkinson's was incorrect and they discovered after his death he had Lewy Body dementia which had no treatment or cure and he was headed for a really dark place. Yes, his family missed him and was incredibly sad but that particular affliction would've been a long, lonely road of hell.