Board Thread:Episode Discussion/@comment-1599757-20151212162645/@comment-4010415-20151212211712

Alright, so, this Tumblr post is a pretty nifty analysis of what happened and how Emerald's Semblance probably works. I believe it, especially with the little simplified/in a nutshell thing at the end.

And I've gotta say, that post helped me understand why Mercury's line felt weird to me: It's because, even though he was supposedly standing so far away from her, his voice was loud and clear. He was saying it, not yelling it, and yet we (and Yang) heard it loud and clear.

Meanwhile, when Ozpin's group was leading Pyrrha through the vault, we had a shot where the camera was far away from them, and their voices were quieter and actually sounded far away.

Mercury had actually walked over to Yang, and she only thought he was standing several feet away from her. His voice caught her attention and made her turn around.