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

I play 4 singles I made and always enjoyed. I put them in an apartment I built especially for the purpose of them living in the same building so I could have them develop relationships and marry. The two couples were at the point where they just became girlfriend/boyfriend when they all headed out to work. Just outside the building the guys both noticed a UFO and stopped, looking up at it. At the same time a meteor struck killing both of them! Of course I didn't save and got right out of the game to redo! It only happened that once, thank goodness, but I didn't realize until then that an attempted alien abduction and meteor strike could occur at the same time! Always keep an eye to the sky in this game! LOL This was in Sims 3.