The Show 'Lie to Me' is based off of the work of Dr. Paul Ekman. Here is a test to see how good you are at spotting microexpressions.
Microexpressions are the involuntary expressions that show your true feelings even when you are trying to hide them.
Our lies are as important to who we are as is the truth. Our story is actually told via the lies we use to cover things up. If our emotions were displayed honestly there would be no real story. The true feelings are the 'subtext'.