Board Thread:Boruto Discussions/@comment-25319479-20160708115044/@comment-732150-20160712204517

Rasengan being launched was a feature of it being stored into and released from the Kote, not something it does by itself. So, "Water Release Bullet: Orca" and "Lightning Release Bullet: [what?] Breath". I know little about translation, but I'd say that being potentially attacked by a surge of lightning does come across as threatening.