"Kilroy was here" is scrawled on one of the rocks Bugs strolls part 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.
Mel Blanc creates 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.
Shortly after the rocket's liftoff, the music heard in the background is from "Dawn and Siegfried's Rhine Journey," an excerpt in Richard Wagner's "Götterdämmerung," the last movement in "Der Ring des Nibelungen."
The last of the "pre-1948" group of Warner Bros. cartoons that were sold for television syndication in 1956 to Associated Artists Productions (a.a.p.).