Kitties are so adorably neurotic and anxiety prone. Mine apparently forgot what loud rain was like and was glued to my wife and I like a little kid last week, in mortal terror of the sky. She's 10 and lived half her life on the east coast, with hammering rains.
One of mine makes a variation on that sound when he sees a strange cat at a distance through a window. Doesn't make it to "No no no no" but I sometimes think of it as him yelling NO! nnnNNO! though his teeth.
Didn't I once read a Stranger feature with a talking cat ? Not like this cuddly little kook -- it was a spooky and EEEVIL taking cat. Now, who wrote that again... hmmmmm...
@6 - we deliberately chose household items to match the cat so it won't show up when she sheds... (how lazy does that make us?)