Good observation, but even more telling is the fact that Dick Morris was questioned about her frequent use of laughter and he said that she has been trained to laugh when she becomes angry at a question. It is her natural personality trait when angry to say something really snotty like "What do you want me to do, stay at home and back cookies"; or worse yet, Hillary starts cursing. She has even been known to become violent when angry. Hillary is being trained by her handlers how to appear more mainstream. So that's why her laughter seems so strange and exaggerated. Body language experts said on Bill O that her laughter is not genuine. She is just using to hide her very inappropriate personality traits, at least for a leader of the free-world. Her personality would have been just fine had she turned 60 in World War 2 Germany, but for the United States of America, it is completely inappropriate and out of line. So she is be trained by her handlers to hide it, just like she uses plastic surgery to make herself appear more mainstream. Without her plastic surgery, she would look like a complete goon, kind in the way Hitler looked like a goon.
Now, she's just plain junk yard dog mean..
sw