Optical Illusion (Jon Shelton)

Optical Illusion is a screamer video uploaded to YouTube made by user Jon Shelton, also known as Mad Dad.

The video begins with on screen text reading that you'll be focusing on the screen to witness a dot blurring in and out of focus. The actual test only has a sloppy black dot on a white background that never changes position.

At 0:43, Jon himself zooms into the screen in a dark room as thunder loudly blares. The video ends with the intro for Mad Dad Productions.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=izvtXLGCtP0