What are the most unsettling deaths in TV/film?

Current Events

These arent gory or shocking, more emotional.

13 Reasons Why.
the end of season one. You know what happens the whole show, you know its coming, but man it was still so depressing and sad.

Buffy the Vampire Slayer.
her mother. It was just random and out of nowhere. It was realistic. No monsters, no villains. Just a random health issue.
It was in real time I believe with no music and seeing the shock and horror of Buffy. It just felt so realistic to me the way it was done. Buffy fights everything, yet here she was pacing and couldnt punch or do anything to help.