Silly as it may seem, I was laughing out loud to myself while browsing this site. Yes. It's the Infinite cat project.
The idea is as simple as it is hypnotic. Some guy took a picture of his cat. And some other guy took a picture of his cat watching the original cat. And the next guy took a picture of his own cat watching the second picture etc. The result is actually quite cool. It's even cooler if you start from the middle and work your way back to the original picture. It's totally hypnotic.
Anyway, I'll shut up now.