As a motivational speaker who talks a LOT about how to communicate effectively, I've never really focused on the mechanics of lying. I like to think I know a lot about the subject, but learned in this great video of a presentation by Pamela Meyer entitled "How to Spot Liar" just how much I DON'T really know. Check this one out. I'll bet the next time you find yourself on the lying side of things, you will check which way your toes are pointing.
Click here to watch her brilliant Ted Talk!