So, I was typing a PM and suddenly I realize there was a cat running across my screen. I did not recall installing such softwares on my laptop so I wondering is this AFF new feature or is just something I installed without I realized it?

Anyone sharing the same experience?? It's keep moving as I typing. It was cute but I keep wondering where it comes from and trying to remember very hard if I did install something new. But It did not appear when I typing to make a new blog post. I guess it only appear when I typing a PM/conversation with a user. Please let me know if you know something. Not that I have complain, just curious. Thank you :)