In my Call of Cthulhu campaign, a character received a cathartic, romantic love letter from his long-distance sweetheart NPC. And then the PC was killed in one shot by a sniper in the next episode before being able to write back.

It's a lot. The dice are cruel sometimes in high-lethality systems but it's made a great tragedy for the other party members- they have to share the bad news when they get back to town, and that's some juicy horror/drama roleplaying.