As you step into your interviewers office, you make a powerful and conscious effort to seem competent and pleasant. You sit up straight, you smile from ear to ear, and your handshake clamps down on the innocent paw of everyone you meet like a trustworthy, friendly, agreeable, hardworking, go-getting bear trap. You have this non-verbal communication thing locked down.Except for one problem. And that one uncontrollable tell is completely giving you away. Without your knowledge, your twitchy eyebrow or constant lip-licking are revealing you as the insecure bundle of nerves that you really are. Get these stray gestures under control by paying attention and recognizing the most common non-verbal interview mistakes that can get you into trouble.