It’s always interesting to see the ways that the many Sims 3 expansion packs combine to create unexpected situations. In this case, there are elements of four different packs visible.
Earlier this summer I sent one of my sims to university. Every full moon, the zombies spawn from underground all around my sim’s home. Sometimes it’s raining on the evening of the full moon, and who spawns as a zombie for the night is a random selection of other NPC sims in the town. In this case, the zombified sim was a fairly accomplished acrobat (judging by the higher-level career uniform).
Only two questions though… Why do zombies need to keep out of the rain? and What happened to her right hand to get her fingers all bent backward like that?