Orcas Chase Speed Boat [Video]

This is an amazing video.  I can help wondering what the pod of Orcas are thinking.  I have seen Dolphins play at the nose of a ship when it is charging through the water but never anything like this.  Just as amazing to me is that this couple do not seem to be at all fearful even though Orcas are know for attacking fishing vessels and the difference between us and a seal...not that much.  Anyway, must have been an amazing experience.