A running gag in the series is Mrs. Puff's extensive criminal record. As a result of SpongeBob's reckless driving, he regularly lands Mrs. Puff in jail since she assumes responsibility for his actions. This gag is introduced in "Hall Monitor", when Mrs. Puff is held responsible after SpongeBob inadvertently destroys Bikini Bottom. In "Doing Time", SpongeBob and Patrick attempt to break her out of prison to no avail. It is revealed that she prefers prison to working as a teacher because she does not have to drive with SpongeBob. In "No Free Rides", it is implied that Mrs. Puff once had to move to a new town and start a new school with a new name.