An Optical Illusion (Not from Stareclips.com)

An optical illusion (not from stareclips.com) is a screamer video made by a YouTube user hotogainc on April 21, 2007.

The player is invited to look at the black point in a negative photo of a landscape. The scenery now changes from black to white. After 32 seconds, a low-contrast, continuous loop video is shown in which a boy screams into the camera while the creator's scream begins to play.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=IiGda5Q9eGQ
 * Permalink: bit.ly/3EfKLNk