Originally posted by
hahahahaha, love them! the clapper? - too much. lol #6 is a great visual play on an image. can't remember what those are called. anyone out there know?
@Edeneve: #6 is called an optical illusion, specifically the foreground-background phenomenon such as is often see in the black and white images where you either see a vase or two faces depending on whether you see the white or the black areas as the foreground or the background
You can see a bunch of classic examples here