It's an Illusion!

anyone seen any good optical illusion sites recently. This is the weird kind of stuff I'm talking about
http://www.killsometime.com/illusions/illusion.asp?ID=1

Is the optical illusion that you think there's legitimate content on the page, but actually it's all just advertising?

This post is an optical illusion. It seems like spam but it really isn't. kinda.

I've seen many of those.

(SPOILER)The elephant has four legs.

I used to love those things! I can't remember any sites though but - google is your friend!

(SPOILER)The cow is inflatable

There was this book that I used to have that had a bunch of really cool optical illusions. They're fun for awhile, but sometimes they give me a headache.

I think it's blocked at my college because of the word 'kill'. :p