While we were following the orcas, we saw a sudden display of power combined with a lack of interest on the part of the whale. We had passed a number of different creatures on the way included a baby fur seal and a sea lion which, while one of them had freaked out and bolted for safety, the whales had shown no interest in. Then, there were some birds sitting on the surface. One of the orcas decided this was a training exercise. It was alongside us and then dropped below the surface. I could see the silhouette under the surface and the acceleration was scary. A couple of pumps of its tail and it shot off towards the bird. It knew something bad was coming and tried to get away. It fluttered violently to try and escape but was overtaken by the whale and then vanished below the surface.
Just as suddenly as it went away, it suddenly popped up again and started fluttering in the onsite direction. I guess the whale had a bit of a play with chasing it and then lost interest. The bird survived to live another day but the whale probably never really cared about it in the first place. I guess if the bird could comprehend how little the attack had meant to the whale, it might be a touch annoyed!