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

I agree that dying from laughter is stupid and happens way to fast and often, especially when it is so hard for sims to die from just about anything else that actually should kill them - like getting electrocuted. In one of my games - both parents died at the same time - they had toddlers and were having a wedding party and the playful/happy buffs added too fast for me to even be able to get them to a mirror in time to calm down. It happens a lot with toddlers because they get that playful buff from the toddlers being cute - so toddlers are deadly! I would not mind these emotional deaths so much if they at least gave us a bit more time to try to save them if we want to - like calming down with the mirror. As soon as a sim hits very playful - you have to get them to a mirror really fast to calm down or they get hysterical and die.