R&B superstar RIhanna debuted the video Tuesday for "Man Down," the fifth single from her "Loud" album.  In the video's opening scene, the singer guns down a man whom, it turns out later in the video, had sexually assaulted her outside a nightclub the night before.  The video debuted Ruesday night on BET's "106 & Park" show, but, thanks to the wonder of YouTube, you can check the video out below.