For me, it’s just that something about the delivery and setup feel like they communicate I’m about to experience a very different kind of joke, and so the non-sequitur “I’m piss” catches me completely off guard in a way that makes me cackle

I think humor that depends on seting up and then subverting expectations with something dumb or nonsensical is often very hit or miss. But that sense of humor is increasingly popular, especially among gen z