oops oops
oops oops
oops oops
oops oops
oops oops
oops oops

The intensity graphs above show the brightness at a spot in the image as height.  312 is on the left and 313 is on the right.  The firrst pair of images are of the speculars from the handholds on the bubble top frame of the limo.  The second pair show a small bright spot on the corner of an armrest where the background is more constant.  Note that in 313 there is a general sloping down to the left in the direction of the streaking.  If the spots were moving at a constant rate and the brightness of the spot is constant then the streak would have constant height.  The sloping down to the right indicates that either the spot was getting dimmer or the velocity of the spot was increasing.  The faster the spot moves the less time it spend over any point so less exposure at that point.