1.Looking left is recalling .looking right is lying
3、hand friction is a kind of self a comforting gesture
5.If a person keeps repeating a word or a sentence, chances are that he is lying.
6.the expression of surprise for more than a second is fake
7.People who don't often lie after telling a lie ,will deliberately avoid your eyes ,and the liars will stare at you ,to make sure you really believe him