"Eye Tricks" Post 1

I have always been interested in perception and how the brain and eye try to work together to give humans an image. I love seeing illusions that trick the eye. I always think these are really fun to do and at the same time, really strange. Like for this https://www.youtube.com/watch?feature=player_embedded&v=OrIgwSxZDcc , I have no idea how they do it, nor do I want to know how they do it. I like being kept in the dark and enjoying how they do it and being puzzled every time I watch that.

Here is a website that tricks the eyes by images. Video is not the only way to do this. Im sure everyone here has been tricked by a couple of these images. http://brisray.com/optill/oreal.htm

Last, I would like to leave everyone with this. It is a famous pitcure and im sure you all have seen this one. But if not, how many legs does the elephant have? I see 8 legs but only 5 with feet. But who knows...