Re: Sims 4 - Death by Laughter?
It can take a few in-game hours for Death by Laughter to actually take place, your best bet for it to happen is to crank up the Playfulness Emotion and keep them in an area where they will remain in the "Hysterical" emotion for a long period.
Comedians are the most susceptible to this form of death. A good tactic if you want to kill a Sim off this way is to have them tell jokes in a room with Playful objects all around, and an audience of Sims they can tell jokes to. If you have a Sim with the Hilarious trait, try telling the Sim you're trying to kill the "Funniest Joke in the World" for an immediate +3 Playfulness. Bubble Baths also give a +2 Playfulness.
Don't forget to combine Happy Moodlet objects along with Playful ones, too; if you can keep the Sim in the Hysterical mood state for a prolonged period, you should eventually see them die.
- B