Before Gumby leaves for his next gig, he tells Denali to squirt some super-growth formula on his watermelons. His chore done, Denali goes to sleep, giving the Blockheads free access to Gumby's melons. They make off with half of the crop before Gumby's livestock notices. The Blockheads sell the watermelons in town, but the formula makes them grow huge, have eyes, and run around smashing things. Denali redeems himself by popping the fruits like balloons with chunks of ice, ending their reign of terror. The newspaper tells the story of the melon thieves and the heroic mastodon, discretely forgetting to mention that it was Gumby's stupid fault that they got all mutated to begin with. I bet he greased a few palms.