This isn't a wipe thing, but... I think it'd be pretty funny to have bosses have randomized silly actions... Like, you're about to come up on the boss, but you don't see him, instead you see a sign written in blood, and a rowsdower goat corpse next to the sign which reads something like- "BRB, snacks!" And then he comes out holding a huge bag of "chips" until he sees the group (aggro range) then he drops his chips and gets all angry while crumbs fall from his mouth. Or something stupid. Imagine coming up to metal maw who is in the process of taking care of natural business, and when you get close enough you scare him and he poops a little before going all epic and berserk on your asses.