Even though he produced the track, Mississippi MC Big K.R.I.T.'s vocals barely appear on "I'm Flexin'," the strong new comeback single from the just-out-of-jail T.I. So it's cool to see that T.I. has granted K.R.I.T. a ton of camera time in Motion Family's video for the track. Too bad that K.R.I.T. looks way, way too nervous and excited every time ...