Scary interior illusion  

Take a few moments to see if you can see what is wrong with the interior in the picture. This is an illusion, so it may take a minute before you see it. A sound that is part of the illusion will appear after a moment, so turn up the volume on your computer before clicking through.

If you don't like beeing scared or think that something scary may be detrimental to your health or provoke seizures, you are advised not to click through. Children, ask your parents to preview this before they allow you to look at it. You have been warned.

http://www.moillusions.com/2006/03/scariest-optical-illusion.html