Groundling Marsh - Season 4 Episode 12 Ooops!

Mud/Slinger believe they have done everything wrong. First, they get distracted from cleaning the wheels on Stacks's grocery cart in an effort to open a cave door. When they get all their tools, they accidentally shut the cave door – with Crystal inside the cave. Hegdish and Galileo offer to help, but Mud/Slinger, in their anxiety, ruin the other groundlings' plans. But Eco informs Mud/Slinger not to quit. Eventually, they turn disaster into a workable solution.