Lots of stories. My favorite is one guy who went through a round of interviews, passing everything with flying colors, but I sensed something and decided to take him out of the office for coffee to get him away from the formal interview process. Within 20 minutes he began to explained his theory on how the world was being controlled by aliens and then proceeded to point a few out to me.

I now always take folks out for lunch or coffee before I hire anyone. Some people are simply great at interviewing.