 At the beginning of the film, Bugs Bunny appears on top of the Warner Bros  Logo as if he was in a 1990 Looney Tunes cartoon. Also, At the very end of  the film, after the credits, Porky Pig says "Thats All Folks" as in a  cartoon.  In both cases, Daffy Duck attempts to steal their thunder, only for the  animating staff to torment him into not sticking his beak in any more.