Your mind is indeed corrupt... evidently, mine isn't - once I knew what I was looking for, they're bloody obvious. Though I have to admit they weren't the first things that came to mind.

And how the hell did you find that video? It's insane!

I saw dolphins too

That's cool. My mind isn't corrupted. But then I saw dolphins first as you'd suggested they were there. BLEH. Very nice piece of Escher style artwork though :)