I've anti-death proofed my Sims. All my stoves & fireplaces are upgraded to be fireproof, my Electronics unbreakable, and I send my Sims away from the house when they reach elder. I'm just afraid of them dying :\
Heh I couldn't help but notice that the person who demonstrates such great care and compassion in avoiding sim-deaths is named "Execution" *wink*.
As for what sims do that scares me, I'm in the group that gets startled by electrocution. First time it happened, I didn't even know it was a possibility. A few weeks later, when a different sim was zapped, I wasn't *quite* as startled. With that poor sim, however, I figured lightning wouldn't hit twice, so I allowed him to continue working. Zizzzzap! and the poor thing crumpled onto the floor in a singed and smoky heap. I felt so bad for him!
I've never experienced having sims fidget after I pause, but tonight I did have the TV continue playing. Everything else was frozen, but the TV just kept on and on and on. Not exactly scary but it was somewhat freakish.