Back in the early-mid 2010s, I remember watching a video that says that it has subliminal messages from Monsters, Inc. It went something like this:
White text shows up on a blue background. It asks what "this green dude" is looking at. It cuts to a picture of the "green dude", who is Mike Wazowski. Then it cuts back to the blue background, where the text produces more question marks by the second, then the text reads something like "Well, he's looking at THIS!!!" Cue slideshow of scary images with loud screaming.