What is the worst thing that ever happened to your sims?

Once my scientist Sim was at his working place in the small tea kitchen area. I let him use his simray just for fun transforming the fridge. Instead of transforming to some other item the fridge went up in flames. The scientist's colleague stood by the scene and immediately caught fire. My Sim tried to extinguish the fire to save her but he failed and she burnt to death. He pleaded to the Grim Reaper to let her live but he refused. I was so shocked by this that I didn't continue playing The Sims that day.