Board Thread:Off Topic/@comment-25396609-20160502222905/@comment-24534644-20160514220838

That would be light-speed-vibration. I feel like I've seen it used as a Semblance somewhere before, but I forget where.

Bear in mind that the reason it works for Flash (and his family members with Speed Force) is because he wears tight spandex around his body to minimize drag, and he uses no weapons. Not exactly an ideal RWBY power.