I was out shooting Humpbacks in Glacier Bay, Alaska a few years back.  It was such a fun shoot…  On the way back in, I went below to stow my gear.  Just as we were about to arrive, the Captain yelled, “Killer Whales, port side!"  I grabbed my camera and flew topside, just in time to capture this breach.  Motto of the story: always be ready to shoot.  I almost missed this one!