I thought it was hilarious myself. Especially since it took me a second to make the ORLY noise in my head... then I busted out laughing. It's been a while so it caught me by surprise. I love stuff like that.
Of course, I still laugh every time I think about the cats too so take from that what you will :PI'll leave you with one more example, a bonus comic I did a couple of months ago, mocking the "I'm In Ur" meme with the freakin' cats: