This is one of my all-time favorite Daffy Duck cartoons. I feel like it is the definitive Daffy short.
Pretty much every gag is perfect. From the beginning where it looks like it'll be a typical cartoon with Daffy in a swashbuckling role, to Daffy being turned into an indescribable creature, to Daffy's close-up and fight with another self, to the ending.
I find it interesting how Bugs ends up being the animator, considering Bugs and Daffy had only starred together in one or two previous cartoons (Rabbit Fire... and I can't remember whether Rabbit Seasoning came before or after this). I would have thought an ending like that would work better after the Bugs and Daffy rivalry (though in most shorts the rivalry seems one-sided, unless Bugs needs to defend himself) had been established as a regular thing.