 Are viral videos more dangerous than you think? It may seem that watching Gangnam-style videos or screaming goats on YouTube is just a bit of fun, but think again. From the get-go, Gangnam-style was a virulent mind virus that quickly invaded the psyche of some of the greatest thinkers in the world. Sadly, MIT's elite were some of the first to succumb, and many other bastions of intellectual prowess have followed suit. Academic smarts, it seems, have not proved effective in preventing infection. More recently, the Harlem Shake has swept the world and has not confined its insidious symptoms to people. Scientists have been stunned to observe the mind virus jump from humans to the slightly less intellectually sophisticated C. elegans nematode. But mind viruses like Gangnam-style and the Harlem Shake pale into insignificance compared to the pernicious screaming goat meme. This is so virulent that we dare not expose you to the sound here for fear of propagating its spread. These videos, where the unsuspecting viewer is suddenly confronted by a shrieking ruminant, are so mind-mashing that after experiencing them, most viewers can't even tell that they were watching a sheep, not a goat. So, as you browse the latest hits on YouTube, please be careful and stay safe.