Mel Blanc created the sound of the Martian's bugle by simultaneously vocalizing and squeezing his hands together in rhythm.
First appearance of Marvin the Martian, though he wasn't named until decades later. He has a higher voice and has slightly larger eyes than in his later appearances.
"Kilroy was here" is scrawled on one of the rocks Bugs strolls past on the moon. This phrase originates from the graffiti used by GIs around the world during World War II and was found on fences and buildings all over Europe. The origin supposedly lay in a US Army sergeant who, after checking equipment, would write on it "Kilroy was here". Usually, it was accompanied by a little peeking, bulbous-nosed figure.
A contemporary photo of then-freshman California Congressman Richard Nixon appears in the faux newspaper "The Daily Snooze" under the headline "Heroic Rabbit Volunteers As First Passenger."
Two of the article titles that appear on 'The Daily Snooze' front page may have been taken from real newspapers, namely, "Big eastern interests" and "60,000 Greeks in big push on guerrillas". The Greek civil war was happening at the time this cartoon was released.