The prototype Bugs says his line, "Of course, you know, this means war!" for the first time. This is quoting Groucho Marx's character from Duck Soup (1933).
The first appearance of Happy Rabbit, the prototypical version of Bugs Bunny. He's barely recognizable compared to his more familiar later form. Bugs' first official appearance will come two years later.
The "Do you have a hunting license?" gag was revived (but modified) in the 1953 short "Duck! Rabbit, Duck!" where Bugs Bunny asks Elmer Fudd, "Do you have a fricasseeing rabbit license?"
Ben Hardaway voices Bugs for the line, "'Of course you realize that this means war!".
This is the first short to be directed by Ben Hardaway since "Buddy in Africa" in 1935, he would continue directing shorts for the Looney Tunes and Merrie Melodies series until 1940.