Sandy Rocket / Squeaky Boots

S1, E8: Sandy Cheeks has taken on the enviable mission of taking a rocket ship into outer space. Sneaking in for a look, SpongeBob and Patrick accidentally launch Sandy's rocket and mistakenly think they have landed on the moon. To make their mission a success, they decide to capture what they think are "aliens" - the residents of Bikini Bottom. Mr. Krabs surreptitiously gives SpongeBob a pair of squeaky boots in lieu of pay. No problem. SpongeBob loves them and learns to master the squeaking noise to a new height of communication. Krabs' conscience haunts him as the squeaking noise drives him crazy.