The Einstein Hollow Face Illusion
Download and watch the video to get the full effect.
This is a 1.5 times life size version of Albert Einstein's face, since the illusion works best when the head is slightly larger than life size. It is made from a very strong plastic, and is virtually unbreakable. The mask can be stood up in a window and the whole face seems to follow you as you move around the room.
(via
del.icio.us/ds_charles)
