This is from tuning files only, since I don't have a sim with the Hilarious trait yet, but from what I could see the effects of the jokes are:
- Weaponized Joke: a 3-hours long, 8 strength (!) Dazed moodlet ("In a Stupor"). Apparently it also has a 10% chance of making a sim have a bladder failure, though I'm not completely sure.
- Horrifying Joke: a 3-hours long, 1 strength Embarrassed moodlet ("Awkward Joke").
- The Funniest Joke: a 3-hours long, 3 strength Playful moodlet ("Can't Stop Laughing!").