I've seen this behaviour with seals when kayaking. Fascinating to watch, and I swear they were just showing off to us bunch of humans hanging out enthralled by

I've seen this behaviour with seals when kayaking. Fascinating to watch, and I swear they were just showing off to us bunch of humans hanging out enthralled by the sight of a large seal slamming the octopus over and over again against the water until it was dead enough to disappear with back into the deep.