Obama's body language
46 seconds into this press conference about the stimulus plan, in the middle of a statement about the people of Elkhart, Indiana, Obama quickly flashes a microexpression that indicates contempt, a smile on one half of your face (captured in photo above). "The people who have lost them [their jobs] have no idea what to do, or who to turn to."
Contempt is an intense feeling or attitude of regarding someone or something as inferior, base, or worthless. The connotation of contempt is repulsive, but a more nuanced definition is "my way is better than your way."
Other examples of microexpressions can be found here and here.