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(S06E14) When you see the words "Written by John Swartzwelder" appear on the screen, you know you're in for a great episode.

This episode begins with Bart pulling yet another prank on Principal Skinner by affixing a sign to Skinner's weather balloon that reads, "Hi, I'm big butt Skinner" and is held by a likeness of Skinner constructed so the balloon acts as his butt. Skinner exclaims: "It won't come down for months! Curse the man who invented helium! Curse you, Pierre Jules Cesar Janssen!"

Bart tries to deny he pulled the prank, but the fact that he has blueprints and notarized photos of himself planning it doesn't really help his case. As punishment, Skinner enlists Bart to help him with his amateur astronomy. He tells Bart to meet him at 4:30 the next morning, to which Bart replies, "There's a 4:30 in the morning now?"