I once interviewed a guy who looked good on paper but when he got to the face to face, it became clear he was a nutcase. During the behavioral part of the interview he told this story about building a doghouse on his neighbor’s property line and the neighbor objecting, so he angrily took an axe and knocked it down. Throughout the interview, he cleaned his fingernails with a pocket knife. At the conclusion of the interview he told me he wouldn’t leave until I’d given him 5 good reasons I wouldn’t hire him. I decided not to play the game and told him he wasn’t a good fit. (And he wasn’t, aside from being abrasive and not qualified and crazy.). He sat there drumming his fingers on the table and said, well that’s one reason. I was actually somewhat afraid of him, so I called security and had him escorted out.