You want to click. You do.
The back story on this, which has been lost among the many reloads my other people, apparently the cat has not done this since, apparently this was its reaction to a visitor to the house. It apparently took an immediate dislike to that person and displays it with the ears back and the fur puffed out. Some people feel this was "mean" to the cat. Having not been there I couldn't tell you. I can tell you as the previous owner of a person specific cat sometimes cats just do not like somebody. Mine whenever someone came over they didn't like, after hissing, spitting, and fleeing down the hall would find whatever beloved item of mine was available to pee on. The owners may have gotten off lucky if all this one did was say No, no, no, no.
I think it might be related to the chattering some cats do.