Amazing optical illusion has a dragon's head follow you

(CBS News) I love magic tricks and optical illusions. A few months back I showed you an amazing, must-see one involving water, some sound and a change in the way the camera perceived what was occurring. Today I've got one that is a lot simpler, but just as incredible. Check it out.

The trick works through the use of the "Hollow-Face illusion", which simply stated takes a concave mask to give the appearance of a convex face at any angle. But for those like myself who work better with a visual to learn what's occurring (or didn't understand the explanation), YouTube user brusspup, the same poster of the previous optical illusion that made water appear to stand still and flow backwards, has created a concise and visual explanation which I'm including below.

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