With no warning my mom sims died of laughter. I am so mad.

"Felicity1169;c-17359085" wrote:
Wow I never actually had a Sim die accidentally from a emotion death before, usually I need to go through a lot of effort to get them to the point of death and even then they just don't feel like it. I actually don't think my sims even get hysterical that often, maybe it's the traits I'm giving them?

For sure that plays a role too. A hot-headed sim more easily dies an angry death, for example. I also wonder whether there is a greater risk of some of these emotional deaths if you have more packs installed > more factors that add to the sims' mood. That is a theory I have, at least. And of course, like others write in this thread, affluent sims with many objects more easily become happy to the very to the hysterical.