Separations of the bulbous shroud covering the Jupiter-bound Juno spacecraft atop the Atlas 5 rocket and the Centaur Forward Load Reactor deck that helps stabilize the nose cone are captured in this video clip -- both in normal speed and slow-motion.
Source: NASA TV (49 sec MPEG-4 (H.264) file)
Download this clip to your hardrive.
(Windows users right-click this link. Mac users control-click this link)