What's the most you've seen someone be so out of touch with reality?

My brother was convinced our critically ill, almost 80-year-old father in hospice care was immortal and he would lose his shit if you dropped any reality bombs at him. Dad had 4 serious things that will kill you, including end stage renal failure. My brother decided that I should just give my dad one of my kidneys and he'd be fine. I should note that our father was told by actual doctors that he would not survive ANY surgery and was NOT a candidate for kidney transplantation. It was never even on the table. I should also note that I was never tested or shown to be a match and I'm less than half my father's age, so why would I risk major surgery for someone who was given a few months to live? My brother had 2 kidneys of his own he never offered up and we have several siblings, but I was the villain in his story. When our father died a few months after that, my brother screamed at me that it was my fault our father died and that I "murdered him". I was also a "selfish bitch" for moving out and getting married and moving away, as normal people do. He's over 40 and never worked or moved out and I haven't lived at home since I was 17, but everything in his life is my fault. I don't speak to him anymore. Because, crazy.

/r/AskReddit Thread