If you have seen the above cat in action, you're probably trying to get rid of a massive headache and keep your eyes from twitching.
I don't understand why this "Acid Cat" illusion webpage has gotten any semblance of popularity on the Internet today. It's not fun, it's not cool, it's barely even "trippy." It's just painful to look at for more than three seconds.
UniqueDaily provides the following quote about the cat, "For those who don’t do drugs but want to experience an acid induced trip, today’s your lucky day."
I don't know what kind of "acid trips" that guy has been on, but I don't recall them being this annoying. Maybe if you're reading a William Burroughs' book?