What motivates you? For me it's usually coffee and anger, which apparently is not the right answer in a job interview. And they say honesty is the best policy
Once I was asked to tell my favorite joke during a job interview. I absolutely panicked. There is no joke I love that is job appropriate and the rest I know are terribly unfunny. It was then I knew I wasn't getting this job.
Oh god, yeah there's no way I'd be getting that job either. My sense of humor tends towards the dark, put me on the spot like that and there's no way it's ending well. Heh, had one job where I made a joke about suing over a hostile work environment and the next thing I know we're all in a staff meeting with HR.