Funny - No one ever said "His video captures the actual moment of assasination" except you.  Why would you come to that conclusion? So then let's hear your theory as to what that is which pops out of the water and submerges?  I know....maybe it was a buoy or a life preserver....no that's not it....I know....it was a baby orca....no, that's not it either.  Ahhhh....it was a merman!  I'm sure you have some inane response...