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Trick Your Eyes!
From Screamer Wiki
(SCARY PRANK) Trick Your Eyes! Optical Illusion is a screamer video. It shows a moving hypnosis spiral. After 55 seconds has passed a picture of Regan appears along with a scream. The picture seems like its moving because of the effect the spiral has to your eye which makes it more startling.
Link
NOTE: The following video contains a screamer:
- youtube.com/watch?v=rpFdjG0CKjw