what's is the saddest thing you have ever watched? (movie,documentary,tv show, anything)

Is it weird that I love sad movies? To me there's nothing better then curling up on my couch with tissues and a glass of wine and watching sad movies and crying, it's almost stress relieving 😂 sad I know but I love it. So what's your favorite sad movies or the saddest movies you've seen? I'll add movies throughout the comments but to start off, the documentary 'Dear Zachery:a letter to a son about his father, I just put this on a different thread but this shit ripped my heart into pieces 💔