Sounds like someone is both angry and a poor liar ;) I'd classify it as a defensive move by someone who was just accused of being an excessively angry person. I imagine the person is well aware of how angry they are.

Thanks for the video. I don't agree that my calculation of "how much will I enjoy that?" which guides my decisions is based on the way I'd evaluate what I expect as if it had already happened and I were remembering it, but it's a fascinating claim. I agree with the rest of Kahneman's talk. I think he says that reflective happiness is determined by goals and wealth, but experiential happiness is mostly achieved by spending time with people you like (I'm not sure, because he appeared to mislabel one or the other, likely due to speaking error).

I concede that when people are motivated to hide their feelings, the way they do it can include some actual self-deception as well.