Here's what they do after jellyfishing:
* They get caught by Mrs. Puff. Mrs. Puff, SpongeBob's boating school teacher, catches them for driving recklessly.
* They go to boating school. SpongeBob and Patrick are forced to attend boating school, which ends with SpongeBob failing his driving test.
* They go home. SpongeBob and Patrick leave Mrs. Puff's school and go back home.
It's important to note that "Big Adventures" isn't a specific episode, but rather a term used for the show's overall theme and often the title of specific episodes.
Do you have any other questions about "Jellyfishing" or "SpongeBob SquarePants"?