Mack and PC (aka "Pervert Clown" aka "Frank Reynolds") 苹果 spoof for the FX series "It's Always Sunny in Philadelphia" -- the smartest 显示 about dumb-dumbs ever.
It's Always Sunny in Philadelphia's creators have a different hidden message each season which plays after the credits of each episode. The audio is just simply reversed. I've compiled seasons 1-7 (and the 圣诞节 episode) here.