Saw bits and pieces of the Chris Brown interview with Larry King and when Larry asks him what his thoughts were after seeing Rihanna's face and Chris' reply was , "Wow, just wow!" and "I don't remember", I was too through.
I've heard of people going into fits of rage where they don't remember their actions, but if Chris experienced that type of rage, then he's more of a danger than expected. To literally black out in a sense while beating someone? Madness.