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The Simpsons Subliminal Message
The Simpsons Subliminal Message is a YouTube video uploaded in December 2011 by user KillerPunkSuperMario.
Video
It features a slowed down clip of Bart Simpson speaking while taking off his cap. This happens for six seconds, until Regan MacNeil appears with her usual scream for the last three seconds.
Link
NOTE: This video contains a screamer.
youtube.com/watch?v=nHf8ULWttbY&index