In the sequence where Bugs ties Elmer to the railroad tracks and pretends to run him over with a train, Elmer's cries of "Oh, agony, agony, agony!" are provided by Mel Blanc instead of Arthur Q. Bryan.
As Bugs is pleading with Elmer not to quit, he turns to the audience and comments, "'Bette Davis is gonna hate me for this." Davis, at the time, was going through a well-publicized legal battle with Warner Bros. trying to get out of her contract.
Elmer tears up his contract with Warners and leaves. This cartoon was also the last made by Robert Clampett before he left Warners, though there were some others in the pipeline that came out later.
The opening sequence, in which Bugs traps Elmer inside a log and rolls it toward a cliff each time Elmer tries to exit, reuses the animation from the 1941 Tex Avery cartoon All This and Rabbit Stew (1941). Instead of Elmer, though, the previous film features a black hunter chasing Bugs. Elmer was simply drawn in over the animation of the black hunter, right down to the same body poses and facial expressions. This has confused a number of people into thinking the former film was completely re-done with Elmer, whereas it's only the one scene.