When someone asks, "Where do I know you from?", I always say, "Probably from the mental hospital."
LOL!!! Too funny ... I had someone ask me that on a plane (from LAX to D.C.) I recognized her immediately ... and answered "I'm a Welfare Fraud Investigator." I don't think she said another word the entire flight. :) Actually, she brought her grandmother in for me to question and there was no fraud found. Thought I should clear that up. :)