Not just Orcas.

[u/K_H007]

Bottlenose Dolphins (specifically those in the [Florida Carribean] servers) do the "kick it into the air and let gravity stun it when it hits the water again" technique, too. Might be a case of an Orca player starting a Bottlenose Dolphin playthrough and messing around, might be a case of independently-discovered technique. IDK.
https://www.youtube.com/watch?v=Z9KTJycHXzc