In which cartoon عنوان did Bugs slam doors on two monsters before forgetting the first one was still there?

I recall a Bugs Bunny cartoon where he opens a door, and there's a monster/villain behind it; he screams, slams the door, goes the other way, and opens another door; there, he screams and slams the door on a different monster/villain. Then he goes back to the first door, opens it as if to escape, sees the first monster/villain again, and then says, "Oh yeah...."

Did I just dream that? If not, what episode / عنوان was that in?

Many thanks!