Captain Marvel Jr #84 (1950)

Freddy Freeman is peddling papers to Mr. Crane at Lisbon's Tea, then heads to the coal factory, only to be interrupted by a sudden earthquake! He calls CAPTAIN MARVEL to become Captain Marvel, Jr. and saves a car from falling into a chasm and lifting a fallen farmhouse to save the family within. He's further interrupted when a volcano erupts nearby, forcing him to gather up all the lava (by hand) and throws it at the ground to destroy it as people start to evacuate town in terror. A resting Junior puts his ear to the ground and can hear that there's a glacier moving into a nearby logging camp and flies north to shove it back into its proper place. He worries that all of these disasters could easily just happen again and he wonders what's going on as a tidal wave suddenly comes in! He quickly evacuates the small town of Seaward Cove before it strikes and finds on the ground in the rubble of it all… a script! And so far, all the things that have happened… are exactly as the script dictates! As it called for aerial shots, he presumes it was dropped from a nearby aircraft and soon finds that it's indeed a movie… being filmed by aliens! The World's Mightiest Boy soon punches a hole in their craft and their Director openly brags about how they are aliens from the Sirius System and they could easily destroy the Earth with one of their powerful natural disaster weapons so they can film it. Somehow, he plans to use this to also become Ruler of his home world too and activates a Moon Ray that will crash the Moon into the Earth. Junior tries to use his magic lightning offensively to blind them, but returning to being Freddy proves foolhardy, since Sirius is a particularly bright star and Freddy gets slapped in the face and captured before he can say the magic words again. He soon says he'll use his film of destroying Earth to threaten his own planet unless he's named Dictator and proceeds with the Moon Fall as his men throw a bound and gagged Freddy to the Earth along with it, but Freddy manages to fall into a sharp-branched tree with his face and calls CAPTAIN MARVEL to become Captain Marvel, Jr. once more and he pushes the Moon back into place, accidentally destroying the Sirian Rocket-Ship in the process. Later, Freddy is happy that he's saved two worlds from a fiendish unnamed dictator.