Overhunting Coupled With Cyclic Population Patterns. Oh, Wait, That Wasn't Supposed To Be Answered.

It's the Day's Day of Days! Because Vultures of the Sea.

I even have the misfortune to know just what he's referencing here, and this strip still leaves me somewhat puzzled.

Well, except for the eternal tendency of Muir's in-universe media endeavors to work through this strange sort of cargo cult fashion, Muir having the cast just do a rough version of media things, and somehow, it works until Muir gets bored with it.