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An Optical Illusion (Not from Stareclips.com)
An optical illusion (not from stareclips.com) is a screamer video. It tells you to look at a black dot in a negative image of a landscape. The landscape then turns normally and at 0:32, a continuosly looped bad contrast video of a boy yelling at the camera is shown along with the creators scream.
Link
NOTE: The following video contains a screamer.
youtube.com/watch?v=IiGda5Q9eGQ