I don't like this one, but if you want to see the absolute size and power of a killer whale, watch one cruise right up to the very edge of a beach and absolutely demolish a fully grown adult seal. I don't like seeing seals get eaten but man, this is monster of a predator.
These seals are amazingly fast and incredibly brazen about jumping up on boats and demanding humans give them treats. They're practically muggers! This obviously isn't their first rodeo.
I linked this before but... there's just something about it.