Claude Hopper, a kangaroo, and "best darn hopper in the world," is narcissistic and dumb, so a couple of Scottish rabbits take him on. They set up a boxing ring; Claude gets tangled in the ropes. Next, he tries a distance leap, but the rabbits ride on his tail, then leap over as he lands. He tries again, without all the ballast in his pouch, but they've stuck his tail down with chewing gum. Claude falls into the river; the rabbits wash up in his water-filled pouch. Now they start coaching him. First, he's launched from a see-saw, bouncing off a zeppelin and right through the meat price ceiling; he lights a match to find out where he is and attracts anti-aircraft fire. The rabbits had given him a case of dynamite as "ballast"; he pulls it out, and falls -- on Tokyo!
When this cartoon aired on Nickelodeon, the ending where Claude's jump destroys Tokyo was edited to remove the reveal that the rubble Claude is resting on is, in fact, the remains of Tokyo. The rubble was replaced with a fake iris out.
Looney Tunes Golden Collection: Volume 6 and TCM Spotlight Collection, Errol Flynn Adventures, Northern Pursuit present this cartoon as a bonus cartoon, uncut, but unrestored. The cartoon uses an unreleased stereo mix of its soundtrack. Note that some of the character dialogue's volume has been decreased, making it hard for viewers to understand the lines the characters say. Also, the opening rings don't appear for the first 7 seconds of the cartoon, hinting that this is an unrestored print, as the original print does not exist, at least on the Internet.