"Smiling Bloopers * Insincere smiling can backfire! (Different from a shy smile that just beckons a friendly "hello.") * Transitioning from a smile to a straight face, too quickly, may give others the impression that you are fake or do not like them. * Going overboard and smiling all the time, especially when it is inappropriate, will make you appear insincere. * If your mouth smiles, but your eyes don't, there is a disconnect that can make you appear less authentic and trustworthy."