This video from last year is one of my favorite "the camera's are off moments" with Mitt.
http://www.youtube.com/watch?v=kVA2Tr_G ... ure=g-vrec
He has his usual turn and burn campain speech rhetoric planned and one reporter who's obviously fed up with the crap that Mitt's been spewing inadvertantly brings the down the rain of fire. After the camera's are "off," you can tell Mitt wants to knock this guys teeth out for calling him out over a lie -- a lie which Mitt tries to defend with semantics.
This guy is a pro. Intimidate, lie, and smile while your doing it.