@ThomasPaine
What I find strange about his snap, is that right after the joke, the camera pans to Will Smith and he's still laughing, but you can see the wife puts an annoyed face. So I wonder if in the immediate second after the camera pulls away, if she says something to Will Smith to push him over the edge. You can argue that it was just a very delayed reaction to the joke, but that feels odd too, unless Will is that much of a dumbass IRL, that it takes a while for his brain to catch up.