Title: Demolition derby
Description: Demolition derby: After SpongeBob injures Mrs. Puff during his boat-driving test, the hospitalized instructor tries to get rid of her reckless student by encouraging him to enter a demolition derby.

Class confusion: When Mrs. Puff takes a day off from boat-driving school, Horace and SpongeBob trade identities, and as a result it appears that SpongeBob has miraculously passed his boat-driving test.
Subjects: Schools, Boats and boating, Juvenile fiction, Teachers, Demolition derbies
People: SpongeBob SquarePants (Fictitious character)