ThunderCats

S04E11 Helpless Laughter

The alignment of Plun-Darr's moons brings a drought to Thundera. In search of water, Panthro and Snarf encounter Ezuka, the flying Serpent of Dreary Canal, who also seeks water. Ezuka attacks them, sending them tumbling into the Swamp of the Laughing Lilypads, where they uncontrollably laugh. Meanwhile, Ezuka targets the Lair in its quest for water. Lion-O uses the Sword to summon rain, and he and Ben-Gali employ the Thunderstrike to melt ice. However, Mumm-Ra intervenes, unleashing a flood. Lion-O rallies the others, freeing Panthro and Snarf from their laughter, and together they use the swamp's water to make Mumm-Ra laugh hysterically, ultimately washing him away in the flood.