I get "hot" when being asked for an explanation why I have done this and not that. While I understand that I may have committed mistakes along the way, I still stand by what I have already said or done. I wouldn't mind acknowledging my failure, but that shouldn't be mistaken for a weakness.
I am just hardheaded.
Which reminds me of the lady who interviewed me when I was applying for my first job. She seemed to be quite satisfied with my answers that out of nowhere, she asked "what would you do if your integrity is being questioned at work?"
Uh! Fresh out of college, what do I know about integrity?!?
Trying to maintain my cool, I smiled and threw her back a question, "what do you mean by that?"
I got the job.