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World's Best Illusion
From Screamer Wiki
"World's Best Illusion" is a screamer video uploaded to YouTube in July of 2007. The maker is user mandel94.
The Video
We are shown a trippy artistic image quite similar in appearance to a flower as instructions tell you to stare at the shape, until too late it reveals it's a screamer. Instead of anything scary, a normal bespectacled man appears with funny high-pitched sounds. However, after the credits, the picture from What's Wrong? will appear with a high pitched scream.
Link
youtube.com/watch?v=-SyfBQpcORI