Elroy accidentally gets a report card mix-up and gets 4 D's, an F, and an "H", so when his dad punishes him, he and Astro run away and join a mob run by Muggsy Megaton. Note: This episode featured a sort-of crossover with The Flintstones; A boy in Elroy's class—Kenny Countdown—has a TV Wristwatch which is showing part of a Flintstones episode, before it is confiscated by Ms. Brainmocker, the class's robot teacher.