Bob Clampett’s second cartoon with Bugs Bunny was “The Wacky Wabbit” (1942) and the first written by Warren Foster. It’s got some amusing bits and one of those Johnny Johnsen openings with two overlay drawings over a mountainous desert background.
The animators in Clampett’s unit are now Bob McKimson, Rod Scribner, Virgil Ross and Sid Sutherland. I’m not sure who animated this Elmer Fudd exit off stage, but Elmer’s colour leaves first, followed by his outline.
Lots of wiggling of fingers and clasping of hands in this little scene. Neat little bit of acting. And, yes, Bugs has a bleached steer skull on him for over a third of the cartoon.